New
#11
Is your system under warranty still?
When you say it does not boot, do you mean it does not turn on, it gets stuck at the post screen, it get stuck starting Windows, it start Windows and you log on but that is as far as it gets, etc.? Please give more details as to the boot issue you see.
If the system will not turn on, this would indicate a likely PSU failure is imminent. I suspect you have a hardware issue, so if you still have a Warranty, contact HP and have the system repaired. If you no longer have a warranty, we can provide further troubleshooting steps based on the details to the boot problem.