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I have an HP DV2900, and my LCD screen is acting up. Oddly enough- while the display is having problems- it is NOT due to overheating of the GPU (the GPU is intel and is about 60 degrees C). It works great in an external monitor situation, and (if the screen is wiggled a bit in the process) still functions as a laptop. It is therefore an LCD problem of some sort. My problem is choosing what replacement part to order. The ribbon cable could be bad, the LCD itself could be going, and it might be the inverter. I really don't know which.
I have taken apart the laptop to a certain extent. The ribbon cable is plugged in securely to both the LCD and motherboard. There were no visible defects in the ribbon cable. Beyond that I have little information- so I made a video of what the LCD screen is doing. You can find that video HERE:
and offer your opinion on how to diagnose or confirm what is wrong.