My pc gets no power the flashing green light

This sounds like hardware failure. Maybe you should let someone run some checks to know more on power supply visit http://earth-kiss.com/

Assumeing you have already checked the outlet/surge protector has power. This is probably one of a could be a couple of things. Either the power supply or the motherboard. One thing you can check is to remove the side cover from the computer and see if the MB has any lights on, normally green or red, if not I would start with the power supply.

Check the power adapter with a multi-meter, the voltage of the power plug that plugs into the power socket on the laptop should be slight higher than the voltage that is printed on the label on the adapter.
If it is faulty, there are replacement power supplies available on the Internet or at your friendly computer shop.
If the adapter is OK then the power socket on the laptop is faulty or this socket has a dry solder joint connection on the motherboard.
You can test this by wriggling the power plug when it is connected to the laptop, if the charge LED flickers and if you hold this plug in a certain position the charge LED stays on without flickering, then the power socket is faulty.
This can be repaired, but requires the laptop to be completely
disassembled. I suggest you get a quote first.

best guess bad motherboard or bad power supply.

things to test:

1. Check that the power cord is plugged in snugly to the back of the computer and connected to a working power outlet or surge protector.

2. Check that the power cord is good. Replace if needed

3. Have the computers power supply checked. Replace if needed

4. Have the motherboard checked. Replace motherboard or get a new computer your choice.