Fast and loud spinning fan black screen

[Jc0110]

My problem is the same as many others I have seen listed. PC was working fine all these years, suddenly went to turn it on and loud fan noise, blank screen, pc won't boot. Have tried all fixes listed. Power cord is fine, f10 will not start BIOS. Took off back, cleaned fans, redid thermal paste on CPU/heat sink. No sign of overheating, capacitors all look good, am assuming it is motherboard or hard drive?? How do I check those? I was going to hook hard drive to another pic to check it, but can't find a cable to connect to the hard drive--it has a long connector with 7 pins, a gap, then 14 pins.

[KrazyToad]

@Jc0110

Welcome to HP Support Community

I would like to help

We could try a BIOS Crisis Recovery https://support.hp.com/in-en/document/c02693833

If the issue persists please contact HP Support in your region for service options

1) Click on this link - www.hp.com/contacthp/ 
2) Select your product type below.
3) Enter the serial of your device. 
4) Select the country from the drop-down. 
5) Select the chat or get phone number options based on your preferences. 
6) Fill the web-form and proceed further.

Thank you

If the information I've provided was helpful, give us some reinforcement by clicking the "Solution Accepted" on this Post and it will also help other community members with similar issue.