SN85G4 green LED on but no power

[ggv6]

My Pc was on all night but it just stop working. Trying to start but when pressing the power button nothing happens. On the motherboard a green LED is on which switches off if I hold down the power button for some seconds.

If I press the power button again the green light comes on and nothing happens. No fans start or anything working.

Any ideas?

Please help.

[DJWillis]

Has the ATX12 lead come loose (the 4 pin ATX lead under from the PSU that plugs into the front right of the board)?

Failing that try the usual CMOS reset (jumper switched for a few mins whist unplugged) and report back.