a client brought to me today one hp pavilion zv6000, 6 year old beast.
the problem is with the video to the attached display panel. i will explain, and then after you read it, my question is: is the problem most likely with the inverter, the backlight, or something else? what part needs to be replaced?
externally attached monitor works perfectly.
tapping the rubber part that tells the laptop the display just closed, will make the display flicker for 0.25 seconds, enough to read one word. during this 0.25 seconds, everything is tinted red, not sure if it's because it's not fully coming on, it's very quick.
i've unplugged and replugged the display lead that connects to the motherboard, no effect (it did flicker 0.25 seconds at that time though)
i've inspected the rubber part that tells the board that the display is closed or open, all seems to be in order there
probably not a bad video chip, since the external works perfectly
probably not a bad open/closed sensor, seems to work fine
not a loose cable (i've rolled it in my finger while on and it doesn't flicker)
the flicker only happens when power is re-applied to the display panel (either by switch or reconnecting the cable)
when "on", i can barely see the stuff on the screen if i use a flashlight
it flickers when i toggle the switch, so the backlight isn't 100% gone (can they partially fail?)
what's most likely broken?
are there any other troubleshooting steps i can go thru to nail it down?