Notebook won't turn on

Oct 11, 2018
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Hi,

Some days ago I've tried to turn on an old notebook (hp pavilion dv7) without success (until a week ago it worked without any problems. I erased the disk in order to install ubuntu, but i had other things to do and i didn't do it).
I've noticed from the power supply a strange noise (electrical, like a high pitch).
I've also tried to turn on another old notebook with the same power supply, and it worked without making that noise, so it's strange.
I've tried to turn it on without the battery and switching the ram blocks, but same results.
Also tried to hold down the power button for 15 seconds but no results.

What can it be? is a power supply problem or a notebook problem? Does anyone have any idea on what i can try?
 
Oct 11, 2018
2
0
10
0


I think 2-3 years, but it lasted some minutes when the notebook was woring.
I've tried to turn it on with just the battery, but no sign of life.
 
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