01-26-2009 10:40 AM
Solved! Go to Solution.
01-26-2009 12:04 PM
01-26-2009 01:27 PM
not exactly sure; the 1long + 2short beep diagnostic is somewhat generic, it could be almost anything (on the mainboard, including GPU).
you haven't said what machine, but assuming it's a T6x series, do you have it docked with an external video card? the onboard GPU is not socketed (it's soldered to the mainboard), so the only way to disable it (that i'm aware of) is via the BIOS (assuming an external video adapter in a dock is also available for further troubleshooting). i don't think that disconnecting the display panel (flat) cable is likely to help diagnose the problem, but while you're at it, you might want to make certain that it is seated/connected properly. i know that where the display cable connects to the socket on the back of the lcd panel is a tight fit, and the connecter itself locks into place (when mated). you've checked the lcd cable for damage and/or proper connectivity, i assume? what about external monitor to the VGA port... have you tried that? FN-F7 key presses may be necessary to toggle the video hardware b/w the internal/external displays.
01-26-2009 04:24 PM
01-26-2009 04:31 PM
I have proven the memory and system board are ok. Need to isolate between the vga card and internal display. Does anybody know what error symptom you get when you unplug the display cable from the vga card? Will you get the 1 long 2 short beep sequence or something different?
01-26-2009 04:55 PM
plug your system into an external monitor (via the vga port) to test the GPU (video card)
you may need to press FN F7 to toggle b/w internal/external display
plug the external monitor into the computer and turn it on, before powering up the thinkpad. if you get a good image on the external monitor, then chances are the video adapter is ok.
does anything appear on the lcd panel? backlighting on?
01-26-2009 05:53 PM
01-26-2009 06:18 PM
Failing LCD or inverter will NOT affect the GPU, or external VGA output.
Chances are that NVidia in your G41 has gone south.