hey,
I have a Hp Media Center PC M1270n The power supply on this computer has a green light on in up untill now it was always on green. Now it is flashing andI can not get my computer to come on. What does this mean?

Hi ,

Intermittent power supply lights can be caused by a number of issues , not always specific to the power supply itself - googled this for you - specific troubleshooting on power supplies for HP and Compq Desktops . Hope it helps .

HP and Compaq Desktop PCs- Troubleshooting Power Supply Issues