lcd panel looks like it has a smudge in stock

I have a DB T20 that is projecting a brown smudge/ spot on the screen. It looks like it’s on the lcd if I look through the front lens. I know can see the lens is fine. What could it be? Is it worth opening it to take a look? Also it makes a buzzing sound like a fan sticking for first minute on power up then works fine.

Ok So there is a SOLUTION. If you want to fix your little projector you need to order the part below or one of the same dimensions. This part is a little bit thicker than the stock one but if you carefully press it in or widen the side guides a little bit it will fit and work perfectly. I ordered two so I would have a back up. It did take over a month for the part to come. I wrote it off because they never sent an email to say it had shipped, but eventually it did show up. That"s ordering Chinese parts for you. Good Luck! Haribol

How much DSE you see depends partly on the model you purchased. Pricier models generally feature improved better uniformity, mostly because manufacturers use more rigorous quality standards for their high-end products. But, no matter how much you spend, uniformity is unique to every individual unit, meaning you don"t really know how much DSE you"re getting until you see it in person.

Is your obsessive side getting twitchy yet? Before we discuss upping your Xanax prescription, let"s review how the DSE demon begins its possession of your beloved screen.

If you own a plasma TV, the pixels are individually illuminated and all capable of achieving the same level of brightness. This tends to make DSE less visible in these devices, particularly in high-end models.

Still, DSE may afflict cheaper versions, particularly if the anti-reflective coating on the glass that overlays the screen is of low quality or poorly applied. Furthermore, as the display ages, the phosphors in the screen may begin to wear out or malfunction, all of which can contribute to less uniform images, which is often apparent particular in scenes with fast panning shots.

In LCD and LED TVs, DSE is typically a bigger issue, one that"s due to the way these units are illuminated. Before we proceed, it"s worth mentioning that although marketing-speak often treats LED and LCD TVs as completely different technologies, they"re not different beasts.

LED units could be more accurately described as "LED-backlit LCD televisions," but salespeople and consumers alike are too lazy to utter that tongue-wearying phrase while haggling in a big-box store. What"s important to realize is that both categories rely on LCDs (liquid crystal displays), which act as shutters that either block light or allow it to pass, depending on the image that"s being rendered on the screen.

There are a variety of factors that affect LCD quality, notably illumination source. Older LCD TVs, for example, used multiple cold cathode fluorescent lamps (CCFL) to light LCDs from the rear. They provide generally smooth and even illumination, but they make the final product rather bulky.

More modern TVs rely on LEDs (light-emitting diodes) as a light source. Some models have what"s called full-array backlighting, in which the LEDs are stationed in regular intervals behind the screen, creating even lighting and excellent picture quality.

Other models incorporate what"s called edge lighting, which positions the LEDs along the edges of the screen. In general, the overall picture quality isn"t quite as good as a backlit screen, but manufacturers still use it because it allows them to build substantially slimmer TVs.

Regardless of the lighting source, sometimes it"s not the technology itself that results in DSE. It might be due to the way the display was handled at the factory or even en route to your home.

If you"ve ever pressed a little too hard on your smartphone or computer screen, you"ve likely witnessed a bit of discoloration, clear evidence of how sensitive LCDs are to physical pressure. Now, picture a huge manufacturing facility that cranks out thousands of these units per week. It"s easy to see how a bit of mishandling could alter the screen"s consistency.

The same goes for shipping. Some units travel long distances in cargo boxes, and then take bouncy rides in your car to their final resting place on your living room wall. That"s a lot of opportunities for tiny mishaps to affect LCD uniformity.

Given your supplementary comments, this may well be a credible cause of the problem. LCD screens should always be protected from sustained localised or point pressure. Notwithstanding the possibility of breaking the screen glass, the LCD layer below the screen polariser can be deformed - effectively displacing the very thin liquid layer.

Use a non abrasive cleaning solution, diluting isopropyl alcohol (not rubbing alcohol, as it may contain oil) into a solution of 50% alcohol and 50% with distilled water water (or purified/bottled water). You could also buy a cleaning solution that does not contain bleach, ammonia, or vinegar.

Before you start, power-off and unplug your monitor. Spray the cleaning solution on a soft cloth (for example an old T-shirt), lint-free microfiber cloth, or some other very soft cloth. A large cloth is best, since it will help reducing the risk of leaving streaks across the display from finger pressure.

Starting from the top, wipe the screen in one direction until you have cleaned the entire screen. Apply light, but distributed pressure. Repeat if necessary. Let it air dry.

When it comes to cleaning, flat-screen TVs and LCD screens require special care and a gentle touch. With the wrong technique, you can easily scratch the screen or damage the surface"s antiglare coating. Even rubbing too hard can cause pixels (the tiny dots that compose images on computer monitors and TV screens) to burn out and stop working permanently. Most household cleaning products are too harsh to use on electronic devices with LCD or OLED screens, so choose your TV cleaning strategy carefully. These tips on how to clean a TV screen will help protect your device while ridding it of dust, smudges, fingerprints, and streaks.

Before you begin cleaning a TV or LCD monitor screen, check the manufacturer"s manual for cleaning instructions. If a computer or electronic wipe is recommended, purchase a container for quick cleanups. Note that using a cleaning product or method not recommended by the manufacturer will likely void a product"s warranty. It"s also important to avoid spraying liquid on the screen when cleaning a TV. Liquids can drip into the frame, get wicked inside the screen, and cause permanent damage.

If streaks or stains remain, wet a microfiber cloth with distilled water and wring the cloth until it"s almost dry. With very little pressure, wipe the cloth across the screen in broad motions, working from the top of the screen to the bottom. If smudges persist, dampen a new microfiber cloth with 50-50 water and vinegar solution, wringing it tightly to keep it slightly damp, and wipe.

To avoid damage to your TV while cleaning, only use gentle products. Never wipe the screen with paper towels, abrasive sponges, or coarsely woven rags, which can cause scratches. Instead, use high-quality, finely woven microfiber cloths to clean TV screens, recommends cleaning expert Leslie Reichert.

You should also avoid cleaning products that contain alcohol or ammonia. These types of cleaners can remove antiglare coatings and cause images to become cloudy or distorted. A simple swipe with a microfiber cloth ($9 for 5, Amazon) is typically all that"s needed to remove dust and other debris from the screen"s surface. When more than a light dusting is required, however, use the guidelines below for the best way to clean a TV.

Practice preventative measures so you won"t have to clean TV screens often. Keep food, drinks, and kids away from TV and computer screens to eradicate risks of messy splatters and fingerprint smudges. During your weekly house cleaning, lightly dust the screens with a microfiber cloth to prevent dust buildup.

Regularly cleaning your LCD monitor keeps it free of dust, smudges, and germs. Wiping with a dry microfiber cloth is the safest cleaning option and is surprisingly effective at removing germs. You may need to use a dampened microfiber cloth to get rid of stubborn smudges and stuck-on debris, though. If you"re worried about germs, consider using a vinegar and water solution or a Lysol wipe on the screen. Be sure to check the device’s user manual first to make sure it’s okay to use liquids!

Screens can scratch easily, and even paper towels and tissues contain fibers that can do damage. “Your best bet is to use a soft, anti-static microfiber cloth—the kind used to clean eyeglasses and camera lenses—and wipe in a circular motion,” says John Walsh, who cleans more than 250 TVs a year in his role as a CR photographer. (Some TV manufacturers will include a cloth for this purpose.) “Gently wipe the screen with a dry cloth to remove dust and other debris, but don’t press too hard,” he says.

You may also want to wipe down the TV’s cabinet, and make sure dust isn’t clogging the vents that help dissipate heat. If the TV is on a stand and not tethered to the wall, Walsh suggests cleaning with one hand while supporting the TV with the other to prevent the set from tipping over. However, CR strongly recommends anchoring all stand-mounted TVs using anti-tipping straps designed for this purpose.

If there are hard-to-remove stains, you can dampen the cloth slightly with distilled water and gently clean the screen. Don’t spray water directly onto the screen; that could cause a shock or component failure if water seeps into the inner workings of the set.

For the most stubborn stains, you can try using a solution of very mild dish soap highly diluted with water, once again applied to the cloth and not to the TV itself. (As a guideline, Panasonic used to recommend a 100:1 ratio of water to soap.) LCD screens, in particular, are very sensitive to pressure and can scratch easily, so don’t press hard.

Even if you don"t have snot-nosed kids or wet-nosed pets, your computer monitor or HDTV panel will eventually accumulate a collection of annoying smudges and stains. My household happens to contain both of the aforementioned creatures and, thus, I"ve developed a method for wiping down the HDTV in the living room and the LCD monitor in my office, as well as the screen of my laptop and iPad.

If you take a quick survey of LCD or HDTV manufacturers about the recommended method for cleaning the surface of your monitor or TV screen, you"ll discover more don"ts than dos, often in conflict with one another.

In the don"t column:Don"t use aerosol sprays, solvents, or abrasives. (This means don"t reach for the Windex under the kitchen sink, as tempting as it may be.)

First, attempt to clean your screen with a dry, lint-free cloth. If you can"t find the cleaning cloth that came with your screen in question, then it"s likely you have one laying around from a laptop, iPad, or iPhone purchase.

After removing any dust from your screen with a dry cloth, dip the other cloth in your dish soap solution, wring it out, and gently wipe your display. Next, rinse out your soapy cloth, wring it out again, and wipe your display to remove any soap residue. Finally, take your dry cloth and wipe the display to remove any streaking.

Editors" note:It"s time for spring cleaning! Week"s two"s theme: physical cleaning.Check backevery day this week to see how best to keep dirt, grime, crumbs, and other annoying bits off your devices. And be sure to return next week for more spring cleaning tips and tricks.

As the weather warms, it"s time for everyone"s "favorite" pastime: spring cleaning. While you"re dusting off the shelves and shoveling out a winter"s worth of detritus, spare a moment to check your TV. Dust and grime can accumulate there, and over time it can become more and more noticeable. And if you have children, there may be an array of fingerprints and other smears on the screen.

The short version? Don"t use liquids, don"t press too hard, don"t use any traditional cleaners. Microfiber cloths are good, but be gentle. Modern TVs are predominantly plastic and therefore far easier to scratch than windows or your phone.

Want the longer version? Here"s what the top TV manufacturers say about cleaning their screens:Cleaning your 4K, OLED, or LED TV screen with a soft, dry cloth is recommended. The goal here is to avoid scratching the screen. Gentle, circular motions tend to give better results, since the circular motion hits each area from several angles in a single swipe.

Caution: Don"t spray water or other liquids directly on the TV, as electric shock could occur.Turn the TV off and let it cool down for a few minutes before unplugging it.

To clean the frame and screen, gently wipe it with a microfiber cleaning cloth. Make sure to wipe the TV frame and screen as gently as possible. TV screens are fragile and can be damaged when pressed too hard.

Important: Never use any type of window cleaner, soap, scouring powder, wax, or any cleanser with solvents such as alcohol, benzene, ammonia, or acetone. Never use abrasive pads or paper towels. If you do, you can scratch the screen or strip the anti-glare coating off the screen and cause permanent damage. Never spray water directly onto the TV. Make sure to wipe the TV as gently as possible. TV screens are fragile and can be damaged when pressed too hard.Gently wipe the screen or the exterior with a dry, soft cloth, such as an eyeglass cleaner.

For inks from oil markers on the screen, soak a cloth in a non-soap synthetic cleanser diluted (by less than 1% ) with water. Squeeze the cloth tightly to eliminate excess liquid, then wipe gently to remove the ink. Use non-soap cleansers cautiously because it may cause environmental problems when disposed improperly.

So why not Windex? Regular Windex is formulated for glass windows, plus a few other surfaces. It contains ammonia and alcohol, not the friendliest of chemicals. S. C. Johnson doesn"t explicitly say not to use Windex on TVs, but it offers Windex Electronics wipes and cleaners, so infer what you will. The better screen cleaners will clearly state that they do not contain alcohol or ammonia.

At last count, I found a billion companies making TV screen cleaners. Almost all of these are something like 99 percent water, 1 percent other stuff. Years ago I tested a handful and found them, on average, to work well enough. If you don"t have luck with a simple cloth and possibly distilled water, a screen cleaner is worth a try, and as a bonus you can also use it for your laptop, tablet and cell phone screens. Plus, they come with a microfiber cloth. If they don"t clearly state they don"t contain alcohol and ammonia, however, I would skip them.

So yeah, cleaning your TV is a good idea. But just remember that they"re exceptionally fragile. Why risk marring their surface by using cleaning methods the companies themselves don"t advise? If you damage your screen with cleaners, you won"t be able to fix it.

My advice? Get a nice microfiber cloth (if your TV didn"t come with one), and use that. If that doesn"t fix your smudges, try a cloth moist with water. Don"t press too hard. There"s less than a millimeter between your finger and a broken TV.

Screen cleaning kits are fine, though most people won"t need them. Remember, like all TV accessories, the store is selling them because they probably make more profit on that $20 kit than on a $500 TV.

As well as covering TV and other display tech, Geoff does photo tours of cool museums and locations around the world, including nuclear submarines, massive aircraft carriers, medieval castles, epic 10,000 mile road trips, and more. Check out Tech Treks for all his tours and adventures.

He wrote a bestselling sci-fi novel about city-size submarines, along with a sequel. You can follow his adventures on Instagram and his YouTube channel.

It is not unusual to see black or purplish blobs that look like ink on the screen of your broken device (phone, tablet, or laptop). But is there really ink in your screen?

You see an ink stain or blob on your screen because its pixels are dead or damaged. When pressure is applied to the damaged screen, more pixels are affected, spreading the "ink" across the screen.

No. Here is how it works. Beneath the glass of your broken device lies a screen. Devices use many different types of screens, but the most popular are LCD and OLED.

LCD stands for liquid crystal display. A liquid crystal is a state of matter between a solid and a liquid. This means that it shares the properties of both liquids and solids.

The liquid crystal display is made up of two glass or plastic panels embedded with liquid crystals. The LCD is called a passive device because the liquid crystals themselves do not produce the images you see on the screen. Instead of emitting light themselves, the liquid crystals are illuminated by a backlight. The liquid crystals alter the light rays that move through them to produce different images and colors on screen.

OLED stands for Organic Light-emitting Diodes. A light-emitting diode is a semiconductor device that functions as a light source and produces light when electric current flows into it. In OLEDs, the diode contains a thin film of an organic compound that produces light when a current passes through it.

The OLED display comprises a flat glass or plastic panel that contains thin films of organic material between two conductors. Unlike LCDs, the OLED display is called an emissive display. This is because it does not need a backlight and produces light for itself.

A pixel is the smallest square unit that makes up the image of a display or screen. The greater the number of pixels a screen has, the higher its resolution.

If a phone has a resolution of 1920x1080 pixels, it means it has 2073600 individual pixels on the screen. When one pixel gets damaged, it turns black or dark because it cannot emit or alter light.

One thing to note is that the ink-spreading phenomena only occurs in LCD screens because the tubes holding the liquid crystals break when the screen gets damaged, causing the liquid crystals to seep into the screen. In OLED screens, each pixel produces its own light and is independent of other pixels. Hence, when your screen gets damaged, the pixels die but do not spread like an ink stain.

While a phone with black spots or "ink" in it could be managed for a while, it will only keep spreading and damaging more pixels. The best thing to do when you notice this type of damage is to change the LCD screen. This can be done yourself in the comfort of your home. Here is a detailed step-by-step guide on replacing your broken display screen.

Before you give in to your impulses and wipe your screen with whatever you have at hand, let us stop you right there. Your display is way more delicate than you think, and if you want it to last you a long time in optimal conditions, you’ll need to treat it with proper love and care.

As you would expect, not all screens are created equal, and some are more delicate than others. The safest way to figure out the proper care for your screen is to search for the make and model of your device, find out if it has an LCD, LED, or some other type of display, and search for the manufacturer’s instructions on how to care for it.

If you want to skip all that, there’s an easy way to avoid making a mistake that might not only result in irreparable damage to your screen but to your entire device. According to Joe Silverman, owner of New York Computer Help, a tech repair center in New York City, no matter how much money you spent on your laptop or tablet, it probably has an LED or an LCD screen if you bought it within the last three years—and neither type benefits from window cleaner or highly concentrated alcohol.

That’s the uppermost layer of your screen, which is extremely sensitive to the acidity in alcohol or compounds like ammonia or propylene glycol, often present in cleaning agents such as window cleaners and degreasers. Using these liquids will corrode the surface of your screen, resulting in scratches or even smudges you won’t be able to get rid of.

“Underneath there it’s the most intelligent part of the laptop,” Silverman explains. “What happens is that the liquid will get through that first line of defense, and when it does that it’s going to really affect the sensors.”

Things get even trickier when you’re dealing with touchscreens. On models like the Microsoft Surface, the display is the main input—as opposed to your mouse or trackpad on a regular laptop—so it’s ultra-sensitive, Silverman says. Using a strong liquid cleaner like a degreaser or a bleach-based disinfectant can obliterate the top layer on the screen. Combine that with high pressure, and you can kiss your fancy touchscreen computer goodbye.

Another downside to newer computers is their size and weight. If you decided to splurge on a new laptop, for example, you probably found one that has top-notch components, but also a slick, lightweight design. This format is only possible if everything in your laptop is smaller and thinner. In the case of your display, a thinner screen means a weaker barrier between your computer’s guts and the elements in the outside world.

Caring for your screen is simple—it only takes a little bit of water and a dust-free cloth, such as a microfiber wipe or the piece of fabric that came with your glasses.

First, turn off your computer and disconnect the charger. This might sound paranoid, but the benefit is twofold—you avoid any chance of triggering an electrical surge, and your screen will remain black, which will make it easier to see any dirt and grime.

Pour a couple drops of water on your cloth. Forget paper towels or the sleeve of that soft cotton t-shirt you love—microfiber is your best bet. Still, no matter how soft it is, a dry wipe could always leave micro-abrasions on your screen. The moisture will also help gather dust and particles while lifting grease from your display.

Use circular motions starting in the center of your screen and moving outward, so you don’t leave any streaks. If you can see any droplets or water traces on the glass while you clean, you’ve used way too much water. Gently dab the residual H2O with an absorbent cloth or tissue paper and start again.

If you’re dealing with next-level gunk, you can use isopropyl alcohol at 70 percent or lower, Silverman says. “That percentage is very important,” he explains. “We’d only use 90 percent or higher on dummy parts that don’t have sensors, like top cases and keyboards.” In these extreme cases, spray the alcohol on the cloth, never directly on the screen, and wipe it gently.

Just like solar damage, screen damage is cumulative. The more pressure you apply, the more abrasive a product you use, and the more often you use it, the greater the damage you’re inflicting on the protective layer of your display and the delicate sensors underneath it.

Maybe you can get away with using a high percentage of alcohol or even a window cleaner on your laptop screen once or twice. But if you keep at it, eventually you’ll see the deleterious effects.

“You’ll see discoloration, lines, vertical and horizontal; sometimes it looks pretty and rainbow-like,” Silverman says. “Sometimes it’ll blink and sometimes you’ll see droplets of water or liquid in the back of the screen. There’s a lot of ways in which damage appears.”

The best way to avoid damaging your screen while cleaning it is to simply keep it from getting dirty in the first place. If you have a laptop, cover the keyboard with a thin microfiber cloth before closing it to prevent finger grease from transferring to the screen. If you have a touchscreen, wash your hands often before you use it, but make sure you let your hands dry completely before you start tapping—the soapy water or liquid hand cleanser from your fingers can easily end up on the screen and corrode it.

Wet, newly washed hands can also be detrimental to regular computers. Silverman says he often sees such victims in his shop—computers completely dead after hand sanitizer rubbed off the owner’s hands, seeped through the keyboard, and ruined the inner guts of the machine.

Your phone was designed to be carried, dropped, tapped, swiped, smashed against your face for long periods of time, and stowed in the deepest corners of your bag. In other words, its screen is way more resilient than your laptop’s.

Silverman explains that most iPhones and Samsung phones, for example, have screens made out of one thick piece of glass. These, as opposed to laptop screens, have all the LCD layers fused together, making them much more difficult to damage. Still, if you’re using alcohol, he recommends keeping the concentration at 70 percent or lower, using a soft cloth, and applying only low pressure to get rid of any accumulated gunk there.

Be especially careful with charging ports, as contact with water (also present in rubbing alcohol) can damage the electronics inside your smartphone. Newer models often are resistant to liquids, but there’s always a threshold to how much they can withstand. And you probably don’t want to know what that is.

Replacing the screen of your laptop or smartphone can be expensive, and even if that’s not an issue for you, no one wants their devices to fail when they need them the most. So remember these tips well—we hope you never have to read this article again.

You’ve been staring at your computer screen for hours when suddenly the words and numbers seem to blur right in front of you. You could just be seeing things... or your computer screen could be dirty. Here’s our tried-and-true method for cleaning your computer screen without leaving smudges or streaks.

Before we explain what you should use to clean your screen, we should tell you what NOT to use. Don’t use large amounts of liquid, and never spray the screen directly. As you’ll see in the step-by-step cleaning method below, it takes just one spray of Puracy Natural Multi-Surface Cleaner on a microfiber cloth to clean your computer screen.

The cloth you use to clean your screen is important, too. Puracy’s cleaning experts recommend a soft microfiber cloth. “Micro” means “extremely small”; a microfiber cloth has tiny fibers that reach every square inch of the surface they’re cleaning, so they don’t leave streaks or smudges like cotton rags can. And avoid paper towels; they’re abrasive enough to scratch the screen’s coating -- and then you’ll be “seeing things” permanently.

Many window cleaners on the market today, including certain types of Windex, contain ammonium hydroxide, which is a solution made of ammonia and water. The Environmental Protection Agency classifies ammonia as an “extremely hazardous substance,” especially in high concentrations. As a result, we don’t use ammonia in any of our products here at Puracy.

Instead of cleaners powered by ammonia, we prefer Puracy Natural Multi-Surface Cleaner, with the fresh-smelling scent of either Green Tea & Lime or Organic Lemongrass. It’s made with plant-based ingredients and water that effectively cut through the grime without the use of chemicals, so it’s safe to use throughout your home -- and it always smells great.

Follow these step-by-step cleaning directions below for a smudge-free computer screen. Or follow along as cleaning expert and Puracy co-founder Sean Busch cleans his own computer screen in this video.

1. Turn your desktop monitor off or power-down your laptop.Then turn it towards a window or a bright light; this will allow you to see smudges and fingerprints more clearly. (In this case, that dreaded screen glare is your friend.)

2. Spray a clean, folded microfiber cloth with one spray of Puracy Natural Multi-Surface Cleaner. If you don’t have any on hand, you can use one spray of water. (Expert tip -- if you notice streaks on your screen after cleaning, then you’re probably using too much solution and/or your microfiber towel is dirty. Try again by carefully following these six steps, but use a fresh, clean microfiber towel and only a single spray of cleaner -- that’s all you need!)

NOTE: If you live in an area with hard water, use filtered or distilled water to avoid depositing mineral residue onto the screen. Not sure if your water is hard? Check out our article How to Remove Hard Water Stains Quickly & Easily; it features a handy map of hard-water areas across the country, plus more cleaning tips for households battling hard-water stains.

3. Wipe the screen with the microfiber cloth, starting at the top and using tight, overlapping “Z” strokes all the way to the bottom. If you’re using the proper technique, then you should see the multi-surface cleaner evaporate behind you as you wipe. This will help you eliminate the appearance of any streaks on your screen. If it doesn’t evaporate shortly after your pass, then you are probably using too much cleaning solution.

4. Turn the folded microfiber cloth to the dry side and make another pass, again starting at the top and using tight, overlapping “Z” strokes. This step will buff away any lint or residues remaining on the screen.

And by the way... if you successfully clean your computer screen but the words and numbers still look blurry, you could be experiencing digital eye strain (also known as computer vision syndrome). Try exercising your eyes using the 20-20-20 rule: Every 20 minutes, focus on an object at least 20 feet away for at least 20 seconds.