The power green light on my hp pavilion t450 uk pc keeps on flashing and my computer is not coming on

check the fan and see if it is busted or any of the cables

it sounds like power supply problem

check your cable coming from plug to pc, and check the power supply box of your pc, one out of them will be faulty because current is not coming to your computer thats y no activity or sound is coming

what you have to is to unlplug the cord then cut the computer on

check the light at the rear panel of the tower ... if it is solid green then reseat the cables coming out of the smps and going to the motherboard and other device drives(Hard Drive and CD/DVD drive).... if there is no light smps might have gone bad

Which light?? the network light?? Do you get anything when you press the power button if not it is most likely the power supply since the motherborad is still showing power also may be cpu!

First with the computer turned off make sure the switch on the power supply is set to 115v.

If you turn the computer back on and you still get a flashing green light on the back of the power supply and a constant light on the front of the computer with no video, then try replacing the power supply with either a new one or a known working good one.

If that doesn't do it then it has to be the motherboard at that point.

Keep in mind normally on those power supplies, the green light should be constant. So it has to be either the power supply is bad or the moterboard is bad and you'll know when you put a new or known good working power supply in the computer.

if your network cable is plugged in it will flash green .....if it won't turn on pull the plug and wait 10 seconds or more then plug in again and see if it will start .....are the fans running and no signal to monitor?

Sounds like it may be a power supply problem.

Not enough to power the unit itself but the LED

replace the power source then ......its obviously faulty