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HP Compaq Elite 8300 Small Form Factor PC (ENERGY STAR)

Hi.

Recently, I was booting my PC and I've accidentally hit the power button when the BIOS was booting (not even the HP logo appeared). From that time, I think my BIOS is corrupt, because when I turn on my PC, I have a black screen, only the fans are spinning, no beeps, and after appx. 45 seconds, the PC restarts. And then it restarts again after another appx. 45 seconds, and after another appx. 30 seconds, the fans start spinning extremely fast (I was scared of overloading the fans and other components, so I killed the PC). I've also tried pulling out the CMOS battery for 15 minutes, and the PC has instantly turned on after connecting to the power outlet and quicky 2x restarted before it got stuck again. Is there any way to flash a new BIOS? And where can I find the file, if it's possible? Thank you in advance.

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