I just fixed a dell monitor with a similiar issue. You might try what I did, and see if it works.
**You must know how to solder, and prior experience with on board repair would help**
***This is not recommended if you have never worked with capacitors before!! I take no responsibility for damage to you or your property here!!**
Carefully take the monitor apart until you get to the power supply board. Normally there are two boards, one is just a controller for the LCD and the other larger one is the power supply. Look at all of the components one the board- you're looking for either dark areas on the board/components that look almost burned, or for something like a bulging capacitor. If you see either, there's a good chance that replacing the capacitors that are damaged will fix your problem.
Answers & Comments
I just fixed a dell monitor with a similiar issue. You might try what I did, and see if it works.
**You must know how to solder, and prior experience with on board repair would help**
***This is not recommended if you have never worked with
capacitors before!! I take no responsibility for damage to you or your property here!!**
Carefully take the monitor apart until you get to the power supply board. Normally there are two boards, one is just a controller for the LCD and the other larger one is the power supply. Look at all of the components one the board- you're looking for either dark areas on the board/components that look almost burned, or for something like a bulging capacitor. If you see either, there's a good chance that replacing the capacitors that are damaged will fix your problem.