There may be many reasons for the blurred screen of the DVI LCD monitor. The following are the possible reasons and corresponding solutions:

1. Problems with the display itself: There may be hardware failures in the display, such as a short circuit in the screen circuit, a lamp failure, etc., resulting in a blurred screen. This situation can be resolved by replacing the hardware or sending it in for repair.

2. Signal transmission line problems: The DVI line transmission signal line may have problems such as loose plugs and poor contact, resulting in poor signal transmission or distortion, resulting in blurred screen. You can check the line to make sure the connection is good, or replace the line to solve it.

3. Problems with the graphics card: There may be faults in the graphics card, such as hardware damage, overheating, etc., resulting in distortion of the output signal and a blurred screen on the display. It can be solved by reinstalling the graphics card driver or replacing the graphics card.

4. Improper setting of the refresh rate: The refresh rate of the monitor refers to the number of screen refreshes per second. If the refresh rate is too low, there will be blurred screen when displaying fast-moving images. It can be solved by adjusting the refresh rate setting to a suitable value.

5. Improper resolution setting: If the resolution setting is too large or too small, it will also cause blurred screen on the display. At this time, you need to adjust the resolution setting to a suitable value.

6. Power problem: Unstable power supply or overload will also cause blurred screen of the display, which can be solved by replacing a suitable power supply or increasing the power of the power supply.

In short, if the DVI LCD display has a blurred screen problem, it is necessary to check the possible causes one by one and take corresponding solutions to repair them.