Thank you for showing your interest in HP Support Forums. It is a great place to find the help you need, from other users, HP experts, and other support personnel. For you to have the best experience on the HP forum, you could also visit our HP Forums Guide for the First Time Here? Learn How to Post and More.
As I understand the computer is not booting into the windows anymore,
To provide an accurate solution, I'll need a few more details:
What is the Operating System installed on the PC?
What is the sequence of the blinks? (Example: 3 blinks and then pause 3 blinks again, in a loop)
Have you made any changes on the PC before the issue started?
Have you performed any steps on your own before posting on the HP Forums?
Please click on the below links once you identify the blink code and resolve the issue:
I have held power button down for 15 plus seconds with power lead disconnected, Removed cover and vacumed dust out.
Removed battery from mother board for 15 minutes , replaced and still no joy , Processor is Pentium E2180 with an Irvine mother board when i switch on the leds flash 9 times then stop meanwhile there is a continuous tone for 15 seconds off for ten seconds then continuous tone 15 seconds again repeating
As I understand you have followed the steps suggested and still having the issue, I would personally suggest you contact our HP phone support for available service related options. If your product is out of warranty please choose paid options to get the tech support number.
Please use the following link to create yourself a case number, then call and it may help speed up the call process: