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Mica1
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Laptop won't turn on, caps lock blinking

Pavilion x360 m1 Convertible

Hello,

 

When I go to turn on my laptop the power button lights up and the caps lock starts to blink 3 long blinks then 5 faster blinks.  The screen is black. 

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Laptop won't turn on, caps lock blinking

@Mica1

It doesn't sound good. As you can see from the chart here, the blink pattern indicates CPU or systemboard failure.I would try the hard reset/power reset mentioned at the beginning of the document:

https://support.hp.com/us-en/document/c01732674

 

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KP1201
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Laptop won't turn on, caps lock blinking

Same thing happens on my Pvillion x360 M1 today (black screen with 3.5 caps lock blinking). What seems to fix mine is when I unplugged all the cables from the motherboard including CMOS battery connection, wait about 2 mins, put everything back in and reboot. First time it reboots, I got BIOS checksum error message but then the laptop correct itself and restart again without any issue afterwards.

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