Question HP 840 G3 suddenly shuts down

Nov 17, 2020
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Hey! I have a HP 840 G3 laptop that started suddenly shutting down and giving these Power LED blinking codes (I would say 4 blinks), which I don't know what it means according to this document https://support.hp.com/ro-en/document/c01732674

View: https://youtu.be/B_qost45FGk

It does happen when in BIOS too, so I'd say it's probably a hardware issue. Sometimes it works for days without any problem, sometimes it will keep restarting over and over. Usually if I press the power button for 20 seconds, it will start after, but once in a while it will only start after ~30 minutes of leaving it without battery or AC power connected. It does happen both on AC with the battery removed and on Battery with the AC cable removed.

The temperatures are ok, the SSD seems to be healthy, the cooler spins.

Since then I: reinstalled Windows, replaced the RAM with a new module removing the old one, replaced its charger with a new one, but nothing worked.

Do you have any ideas on what it could be? Thank you very much!
 

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