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However, two weeks later (few days ago), the laptop started shutting down not-gracefully, ie. it becomes off instantly, without waiting for the system to shutdown. And this time it is unrelated to whether I am touching the laptop, or it is just sitting there. Also, is is not overheating at those times, so we can exclude emergency overheating shutdown (unless the mechanism is failing).
I did memory test with memtest, but found no problem. So at this point I am ready to assume it is motherboard's fault and am planning on replacing it.
If anyone has any other suggestion, please chip in.
Anyway, as I am doing so, I am musing on replacing it with Intel-only GPU, since Nvidia is only 20% quicker, eats more battery and causes problems when connecting external monitor through DisplayPort.
W500 - C2D P9500, 8GB RAM, Samsung 830 SSD + 750GB Hitachi HDD, Intel+ATI GPU, bright WUXGA, FP-reader
Arch Linux, BTRFS+ZFS on LUKS
However, if the RAM was faulty I think it might blue screen before it shuts down. Any blue screens?
How long did you run MEMTest for? And you ran it with only one stick?
With my T420s with faulty ram, I had to run it on memtest for 10+ hours - and even then it didn't give an error, it just rebooted itself.
So I would pull out all the components (HDD, CD etc.) and run memtest or a cpu burn test using bootable linux (e.g. Ultimate Boot CD) and run it overnight and report back.
Former: X61 T8300 [Slow GPU] | W510 FHD QM [Top screen but 16:9 sucks] | T420s [Portable but worst LCD ever] | X201 | X200 | X60T [Slow & hot]
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To be sure, I would run a cpu intensive process (use all cores) and monitor temperature:
Here is a one-liner (requires lm-sensors)
Code: Select all
~$ while sleep 0.5;do sensors | grep "temp1:" ;done
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