Author Topic: [FIXED!] Need Help: Acer 8930 le2 laptop keeps restarting after a few seconds  (Read 232 times)

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Offline Watth

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Edit: Fixed! see solution here  by user xavier60

Hey there,
A neighbour asked me to have a look at his Acer 8930G series laptop (model 8930G-844G32Bn). The laptop is still useful, and they'd like to be able to recover some files from the PC's HDD.
Initially the problem was that it didn't charge : removing one screw revealed the problem was the wire to the PSU connector was broken (stupide design idea : the barrel connector twists when the laptop screen is opened). It looks like a common failure un this model. I fixed the wire, the laptop is now powered.

Now the problem is that the laptop won't stay on for more than a few dozen seconds. Since the first try, it turned on, Windows started its repair process thing, and the PC would restart.
I checked the BIOS, set thing to default, removed the battery, and tried again : same thing, the laptop keeps restarting after a few dozen seconds (sometimes before).
I then tried with a live Ubunbtu USB drive, even after disconnecting the HDD, same thing.
I removed every thing I could (USB ports PCB, PCI slot, Optical disk drive, WiFi module, etc.) and the only thing remaining were the screen, the power button, the keyboard and the power adapter. I checked with either RAM modules. Same thing. The copper heat pipe is not that hot : I can keep my finger on it, so I guess it's under around 55°C. Still I replaced the thermal paste.
A weird thing : If I open the BIOS menu, it doesn't restart on its own.

TLDR: laptop restarts after a few dozen seconds on its own.

What could be the problem? What should I check?
Thanks!
« Last Edit: May 17, 2021, 08:35:05 am by Watth »
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Offline Rasz

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Graphics Processor NVIDIA GeForce 9600M GT

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Online xavier60

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The model seems to use the troublesome NEC Tokin capacitor that filters the Vcore supply.
Search for " Acer 8930G  NEC Tokin"
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Offline Watth

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That could really be it. I'll definitely try to replace this.
To be continued...
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Offline Watth

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Well that was indeed the problem. I could fix the computer for 8.48€ of capacitors.
Thanks a lot!
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