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Bad panel or failing backlight?

post #1 of 3
Thread Starter 
A dark spot has appeared visible on the front corner of the screen of a TN panel monitor for sale.
Is the panel itself failing or the backlighting?
I have spare parts from other monitors same make and model but 2 cracked screens.
Can I use the backlighting from a good monitor and just replace the panel and just swap it out?
Thx
roberta507
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roberta507
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post #2 of 3
Thread Starter 
Found this it helped

There may be a slight discoloration that can be seen on the bottom left and right side of some LCD monitors. The slight shadow is caused by a lesser amount of light from the fluorescent lamps reaching these corners. These lamps produce less light at their extreme edges and the discoloration is inherent to the LCD technology used in the displays. This becomes more noticeable when larger LCD panels are used.

If the patches are extremely evident or occur in other places on the LCD screen, they may be caused by physical damage. This can occur by dropping, rough handling, or placing heavy objects on the computer or screen. In these cases, service will be required
roberta507
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roberta507
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post #3 of 3
What you describe can be the cause of both. I would play with the brightness levels. If the black spot size increases/ decreases with changing the brightness, it is most likely beacuse of a failed backlight (since more/ less light reaches that point). If the size does not change then it is a panel issue. Is it completly black or just darker than the other parts ? Can you post some pictures?
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