Hp desktop bleeping 3 long beeps with red lights and 4 short beeps times 4

[Ali3211]

Hi computer professionals 

My HP desktop pavilion is giving 3 long beeps with red lights followed by 4 shorter beeps with white lights when I turn it on. No display ,no progress...

So far I opened it ,cleaned dust internally ,changed internal battery ,power cord checked .still probl m unresolved..

Could you please guide what could be done next...

Thanks in advance and appreciate your help.cheers 

Ali 

[Paul_Tikkanen]

Hi, Ali:

See the troubleshooting guide at the link below for how to troubleshoot that beep code sequence.

HP Desktop PCs - Computer beeps or a light blinks during startup | HP® Support

Seems to be a power supply issue or a motherboard issue.

That would be all the help I could provide.

[Ali3211]

Thanks Paul 

Appreciate your prompt input and advise.

Cheers 

[Paul_Tikkanen]

You're very welcome.