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T440s almost powers on but doesn't

T430 and later, plus T530 and later series specific matters only
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sebileis
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T440s almost powers on but doesn't

#1 Post by sebileis » Sat Apr 18, 2020 10:50 pm

I picked up a broken T440s from eBay for $40 the other day, and the issue it’s having is rather odd. When you press the power button, the indicator lights, keyboard backlight, and fan all briefly come on for about a second before power is seemingly cut. Then the power button LED blinks 3 times and...dead.

I’ve looked at many different threads online seeing if anyone has this exact issue, and while there are many posts about T440s’s (and similar models) that don’t turn on, there aren’t any with this exact symptom of turning on for a split second before shutting off. I’ve tried all of the usual troubleshooting, removing both main batteries and the CMOS battery, hitting the hidden reset button, removing or re-seating all of the components, etc, with no luck. I’m a bit stumped as to what the issue could be, and I’m curious if anybody could provide any insight.
W540+T450 TP i7-4800MQ K1100M 16 GB RAM 240GB SSD
FrankenPad T601 UXGA LED AFFS X9000 8 GB RAM 240GB SSD
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RealBlackStuff
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Re: T440s almost powers on but doesn't

#2 Post by RealBlackStuff » Sun Apr 19, 2020 1:28 am

Seen these?
viewtopic.php?t=123827
https://erwin2h.wordpress.com/2016/05/2 ... on-solved/

Also: replacement mobos are quite cheap and plentiful on feebay.
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sebileis
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Location: Pittsburgh, Pennsylvania
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Re: T440s almost powers on but doesn't

#3 Post by sebileis » Wed Apr 22, 2020 2:46 am

RealBlackStuff wrote:
Sun Apr 19, 2020 1:28 am
Seen these?
viewtopic.php?t=123827
https://erwin2h.wordpress.com/2016/05/2 ... on-solved/

Also: replacement mobos are quite cheap and plentiful on feebay.
Took a look through, nothing seemed to help. Same symptoms. I know motherboards aren't crazy expensive, but these ones are a bit pricier than T430/420 boards, and I just want to take a shot at getting it working before I spend the money on a replacement board.

If all else fails the parts I can salvage will probably be worth more than what I paid, so oh well.


Last bumped by sebileis on Wed Apr 22, 2020 2:46 am.
W540+T450 TP i7-4800MQ K1100M 16 GB RAM 240GB SSD
FrankenPad T601 UXGA LED AFFS X9000 8 GB RAM 240GB SSD
Dell Vostro 470 GTX 1080 i7 3770 16 GB RAM 2x250GB SSD+2x2TB HDD
MacBook A1181 T8300 4 GB RAM 160GB HDD

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