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Caps lock and num lock flashing 7 times

HP Recommended
Pro Book 450 G3
Microsoft Windows 10 (64-bit)

Dear all,

 

I would like to ask you for help. I cannot run my laptop Pro Book 450 G3. The caps lock nad num lock just flashing 7 times and nothing more happens. 

 

I did not find the explanation for the codes here: https://support.hp.com/us-en/document/bph07107.

 

There is no explanation for 7 times blinking of caps lock and num lock. There is just "Power button LED blinks 7 times with 7 beeps", but Power button never blink - just the caps lock / num lock.

 

Do you have any idea what is the issue, or how to fix it?

 

Thank you for any idea.

 

Thank you.

 

Vilem

 

I treid to remove the bios battery but it did no help. 

 

 

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HP Recommended

I've tried many things but nothing helped. 

the same thing just blinks 7 times...

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