07-01-2011 12:15 PM
Now, I suspect that the inverters are fine and I'm wondering about the LCD switch or LCD cable. I suppose I could just buy a cable, but before that, I wanted to take a step back and try to figure out if I'm overlooking anything. I've not been able to find a picture or location of the t400 lcd switch in either the lenovo hardware manual for the t400 or elsewhere online.
12-30-2011 07:55 AM
My T400 just got same problem. LCD is blank, only faint Lenovo logo visible during bootup, then hardly can see anything on LCD screen. No LED indicator is on either, except the wireless LED. Power setting not working either, so the close lid power function is not working as it supposes to.
Anyone has any idea what happen? and how to repair it?
12-30-2011 02:07 PM
02-08-2014 06:05 PM
Black Screen (faintly visible with a bright light)
Showing a little pink and small flicker just before if went dark.
Works with external screen.
Green indicators below are working.
The oddest this is that ir will show a windows screen at startup about 2 seconds into arriving at desktop. It has also appeared briefly when I returned after it was idle for a while.
Is this something that can be fixed?
Most of the posts said no green indicators. Is this still a problem on the motherboard -- a I read thoe pots, therefore one that can't be fixed at a reasonable rate????
02-09-2014 09:10 AM
09-20-2017 10:23 AM
Hi there. I am aware it's been a long long time since the issue happened, but have you had any luck fixing it? I have the exactly same issue with my brother-in-law T400. He cracked the screen so I replaced it, and after replacing there is no backlight. I ordered new inverter but no luck as well. Please tell me this is no fuse and it can be fixed easily .
02-19-2018 08:42 AM
If the backlight does not come on AND the indicators on the screen (power, battery, etc) don't come on, my guess is that 2 fuses on the motherboard are blown. Lenovo does not do that sort of repair, other than replacing the board.
This is the exact issue going on with the T400 I'm working on. The LCD is very faint, barely able to see the ThinkPad logo as it boots up, and the indicator LEDs on the the display assembly are not lighting up. You mentioned that it might be 2 fuses on the motherboard. What other possible parts could cause this issue, how likely is it that these are the faulty parts, and are they something replaceable?