T420s - randomly offing itself
Posted: Sun Jun 04, 2017 4:49 pm
I have a problemy with my T420s. First, it started randomly generating a signal as if the power button was pressed, so it gracefully shutdown at random occasions, but only when I was typing on the right side of the keyboard. I replaced the keyboard, but it did not change anything, so I just disabled power and suspend button actions (on linux) and it did the trick.
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.
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.