HP having BIOS error, need help with BIOS install

Hello!

My friend stupidly bought laptop without turning it on and guess what? He was tricked into buying a non-working HP (Presario CQ61-320EN) laptop so I have to fix it for him.

When I turn on, laptop screen is black and fan is working and lights are blinking 2 times and after 3 sec again 2 times etc in a loop, which by the blink code is a BIOS problem.

I've tried draining power with removing battery and 30sec pressing power button as well as removing the CMOS battery. Cleaned the dust and changed thermal paste and other solutions offered by people with the same issue and none of them worked.

So I downloaded BIOS for this computer from HP website, but when I try to run the BIOS from USB stick, I see lights on the usb stick meaning it's in use by computer, at the same time I get 3-8 beeps (depending on files I have on the stick) from the computer and right after the beeps, the computer shuts down. Just shuts down :(

How I did things:
1) Downloaded the BIOS .exe file from HP
2) Copied it on USB (currently FAT32) stick
3) After draining power, attached the USB, powered on computer and pressed windows + B.
4) Got the beeps and computer shutting down immediately after the beeps.

Am I doing something wrong? Can the computer still be fixed? Any advice in fixing?
I really hope someone can help me, I'd be grateful.

P.S.
The previous owner sold the laptop without the HDD so I put one I had spare, dunno if that changes anything, as beeps and shutting down is the same with and without HDD.