[Libreboot] Thinkpad T60 "Supported" LCD Not Working

[Joshua Bowren]

I recently installed libreboot on my Thinkpad T60 originally with the 
untested LCD panel LTD141ECMB. As I suspected the panel had issues. Only 
half of the screen was used, it was green, blurred, and had lines on the 
part that was not used. I ordered a LTN141P4-L02 LCD which the libreboot 
project lists as "Tested." After plugging in the new LCD nothing came 
up. No backlight and no pixels. Just the LCD as it was before the screen 
was turned on. I also replaced the inverter board with FRU P/N 41W1478 
as the libreboot page said this panel was recommended for its inverter 
board. It did not help either, but the display on the original panel 
stopped having lines on the right part of the LCD.

With lenovobios the backlight came on with both the original and new 
inverter board, but it still did not work. With the old inverter board I 
had a quick faint showing of the Thinkpad logo when starting, but it 
quickly went away.

After some research it seems the panel I have might be for a T43 or is 
generic. The EDID information might not be for a T60, but I heard this 
would be a problem for the lenovobios as it would reject the LCD.

While switching back and forth from LCDs it seems I blew inverter fuse. 
I probably won't be able to do any more tests soon until I replace the 
fuse/solder the connection, but I still want to know why it did not work.

Any help is greatly appreciated.