Hi there, I have just moved house and when I went to plug my HP 510 desktop back in there was no power. When I plug the main cord in the back the green LED flashes on and straight off again. Can anyone help?

Look on the back of the computer at the power supply, make sure it is set for 115 volts, some of these have switch that can be bumped. The only other thing you can do is open up the case (with the computer shut down, unplugged and push the power button for 10 seconds to bleed off the capacitors) Now go through all the cables on the motherboard and make sure to reseat all the cables, something may have come loose or was jarred during the move. Pay close attention to the long socket coming off the power unit to the mainboard and there is another plug that has 4 wires and has a square port, this is the ATX power feed and it is the one that feeds the processor, make sure all these cables are snug. When you are looking at the front of the case, the left rear is where the attaching screws are for the left access door to get into the case. Look on the back of the computer at the power supply, make sure it is set for 115 volts, some of these have switch that can be bumped. The only other thing you can do is open up the case (with the computer shut down, unplugged and push the power button for 10 seconds to bleed off the capacitors) Now go through all the cables on the motherboard and make sure to reseat all the cables, something may have come loose or was jarred during the move. Pay close attention to the long socket coming off the power unit to the mainboard and there is another plug that has 4 wires and has a square port, this is the ATX power feed and it is the one that feeds the processor, make sure all these cables are snug. When you are looking at the front of the case, the left rear is where the attaching screws are for the left access door to get into the case.