Ps4 fan not working properly

Hello guys, yesterday my playstation 4 was working well with some of my games but when i try to play graphic demanding games like COD Cold War BETA, it just turns of by itself. So today i took the decision to clean my ps4. I disassembled it and cleaned most of the dust off. Now when i put it back on, it turns on, the fan spins like crazy then it turns off(it beeps like 3times). Can you help me please?
ps. I used rubbing alcohol to clean a part of the motherboard, I don’t know if that’s the mistake i did.
Please get back to me as soon as possible.

Did you plug the fan into the motherboard?It is easy to forget =).Did you apply thermal paste also?