Resolve Windows 10 or update issues on HP computer or printer– Click Here
When jostled, my laptop screen goes black and the caps lock key blinks with the following pattern:
3 long blinks, followed by two slow blinks.
This pattern then repeats forever until I shut down by holding the power button.
Since the PC is a laptop, this HP thread describes the different blink and beep codes: https://support.hp.com/us-en/document/c01732674?jumpid=reg_r1002_usen_c-001_title_r0001
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