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T400 Not booting, lights flickering

T400/T410/T420 and T500/T510/T520 Series
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hellfire103
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Joined: Thu Dec 29, 2022 9:33 am
Location: Hexham, Northumberland UK

T400 Not booting, lights flickering

#1 Post by hellfire103 » Wed Jan 24, 2024 6:18 am

We had some heavy rain yesterday and my bag (containing my T400) got soaked. I tried to turn it on just now, and it appeared to boot at first.

I entered my geli(8) password and FreeBSD began to load, then the screen and status LEDs began to flicker rapidly. I tried holding the power button, but for the first time it didn't do anything, so I removed the battery.

When I turned it back on again, it didn't even show the ThinkPad boot screen; it just sat there flickering.

I have opened the case up and looked inside. I hve checked the RAM, the CPU, the SSD: even the DVD drive; and everything seems fine, yet the problem still persists.

Does anyone have any idea what's wrong and how I can fix it? Or is my laptop now borked? Thanks!

ZaZ
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Re: T400 Not booting, lights flickering

#2 Post by ZaZ » Thu Jan 25, 2024 2:22 pm

I'd let it dry, then pull everything out(drive, memory, optical, Wifi, battery). After, plug in the power to see if it beeps when powered. If so you can try putting parts back to see if you can find the culprit. If it doesn't beep, the likely board has a problem somewhere. It can be replaced if you want.
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Gonzaleitor
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Location: Buenos Aires, Argentina

Re: T400 Not booting, lights flickering

#3 Post by Gonzaleitor » Sat Jan 27, 2024 6:54 pm

I'd also try with rice to absorb all the humidity.

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