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What's DOS?
Posts: 1
Registered: ‎03-16-2015
Location: United States
Views: 207
Message 1 of 2

Y400 No Video

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?

Social Support Agent
Social Support Agent
Posts: 5,824
Registered: ‎02-11-2012
Location: PH
Views: 193
Message 2 of 2

Re: Y400 No Video

hi daeven,


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).

  - Link to picture


From the looks of it, you may need to replace the entire screen.

  - Sample item


Y400 Video DIsassembly (see FRU Videos)




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