05-21-2017 11:02 AM - edited 05-21-2017 11:05 AM
Hi, I have a T60 (14.1 inches, 1440x900, 8743-4UK) and the internal display is not working.
What I found out:
1) It does not seem to be a simple backlight failure - it really shows nothing.
2) It is not an inverter problem, I have replaced it (although with a used part) but it still does not work.
3) External display works just fine.
4) When I checked with my external display, I found that the internal display is not recognized at all, as if it was simply not connected.
I really liked the keyboard -- I am willing to fix it if it does not cost a fortune.
Thanks in advance for all help!
05-21-2017 11:53 AM
There are separate outputs from the graphics chip for internal vs. external screens. There is no way to know what's wrong without swapping parts. (parts involved: motherboard, panel, cable inverter) If the inverter was changed and the backlight doesn't come on, and there is no dark picture the problem isn't the panel. I would inspect the cable. If there is no obvious damage motherboard is most likely the problem.
Using the external monitor,, I would first boot into the BIOS and confirm LCD is primary output.