Problem with a Pavilion dv7 - Not Booting

Hello,
I've a problem with a Pavilion dv7 wich is not booting.
When I turn on the PC the F12 key (Wireless) is fix and red and Capslock is blinking.
After search on the forum, I try several things, turn on PC without its battery, turn on without RAM module (2 module with no module, only on,...) but each time I obtain the same F12 red and Capslock Blinking continuously (1 per second).
If someone have any idea to help me I stay tuned.
Thanks In Advance,
Cyrille

Hi Visruth,
I've clean the laptop with a compressed air bomb, so i don't think it's a overheating problem.
When I take out the hard drive I obtain the same symptoms, F12 LED Orange fix and Caplock LED flashes continuously (every 2 or 3 secondes). I did not find this combination (F12 Red + Caplock Continusly blinking) ?
For the record, this is the laptop of my stepmother and I am sure she did not make BIOS update ...
Anything else to help you to make the good diag ? A tools to boot with ? A hardware test to do ?
Regards
Cyrille

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