Not booting even BIOS

[Roman-G]

Shortly, my cousin's son brought me his desktop which stopped to turn on. Actually, only CPU fan and power light are on, and nothing happens. Black screen and no sounds. None USB port has power (I checked back and front). But, when I took off RAM, there were three long and three short beeps. I've replaced RAM with a new module, and no changes - black screen and no sounds. MB costs $250 and Power Supply $275. Any suggestions what to buy first?

[praveenbv · Accepted solution]

Hi @Roman-G, Welcome to the HP Support Community.  

Apologies for all the inconvenience

Don't worry as I'll be glad to help, 

I appreciate your efforts to try and resolve the issue, and in order to fix this issue,  your computer needs to be serviced.  As we have limited support boundaries in the support community as of now,

As this is a hardware issue, I'd suggest youContact HPin your region regarding the service options for your computer. 

If you are having trouble navigating through the above options, it's most likely because the device is out of warranty. If yes? please send me a private message with the region you are contacting us from. Check next to your profile Name, you should see a little blue envelope, please click on it.   

Have a great day!  

Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution. 

Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping! 

[Roman-G]

I've already ordered a motherboard and a power supply to figure out what is not working properly. When I receive them, I will update the post. Thank you.

[Roman-G]

New MB solved the problem. Thanks,