03-16-2015 08:55 AM
The on-board video on my Y400 has stopped working, but I do get video from an external monitor. It started intermittantly, and I assumed it was due to damage from the left hing failure. I replaced the hinges and the LCD cable and thought all was better, but the LCD became intermittant again, and now never works. It looks like I have backlight.
I've heard that inverter failures are common with LCD problems, but can't find a replacement inverter anywhere. Is the inverter just for backlighting?
03-16-2015 12:13 PM
Welcome to the Forums.
From your description, it does seem like you have a failing LCD panel. Upon looking at page 84 of the hardware maintenance manual, the Y400 uses a LED type panel (unlike the older CCFL, these LED screens doesn't have an inverter board that controls the backlight).
From the looks of it, you may need to replace the entire screen.
Y400 Video DIsassembly (see FRU Videos)