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This morning, when I tried to turn my Lenovo P51s ThinkPad laptop on (it was on my desk, untouched from where I'd left it last night), it started the process (keyboard lights up, fan turns on), then turned off after ~2s and repeated the process ad infinitum. Pressing the power button turned it off.

This happened even if I disconnected the power supply and (!) the battery. Looks like it has some sort of internal battery, in addition to the removable one, today I learned.

Activating the hard-reset button on the back with a pin also didn't fix the issue.

Has anyone encountered something like this before?

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  • do you have anything plugged in to it (e.g. external mouse/monitor)? if so, remove it
    – Gantendo
    Commented Feb 16 at 4:03
  • have you tried reseating the RAM (if that is possible on the Lenovo P51s)?
    – Gantendo
    Commented Feb 16 at 4:13
  • 1. Can you enter BIOS? Press and hold F1 while powering on:pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/… 2. If so, try to boot from USB, e.g., with Win PE (as in Hiren's Boot CD) or Linux (as from Ubuntu Live), and check the internal drive of the laptop. It could be dead.
    – DrMoishe Pippik
    Commented Feb 16 at 4:26
  • If you can enter into the BIOS/UEFI, try to do a Reset.
    – harrymc
    Commented Feb 16 at 10:35
  • Thanks for all the comments. F1 did not do anything, it turned off too soon. What helped was letting it drain completely after taking out the removable battery. It started up, BSODd after 1/2h, and now won't start. I'm guessing motherboard issue, but I'll see if it's possible to re-seat the RAM just in case.
    – Eugene
    Commented Feb 16 at 18:22

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