Connetcing the power button

I've cleaned my PC from dust yesterday, disconnected everything and then connected everything back together. The PC is OK, just the power button won't start it.
When I press it nothing happens. I had to turn on the PC using the CMOS jumper. When I press the power button while the PC is on, the power LED shuts down, and when I release it the LED turns back on.

I have a GA-8IPE1000-G (Rev 4.x) MoBo.

 

Sounds like the wire that goes from the power switch to the mobo header is plugged wrong or is not plugged in. If you are sure it is plugged in properly trace the wires from the mobo to the power switch and make sure nothing is cut, or unplugged.

E

 

I'm sure it's connected correctly. Will try tracing the wires tomorrow morning..

 

If your machine is an ATX (turns off by itself without having to use the On/Off switch) the front panel switch is a "momentary contact" switch. There will be two wires (usually, I've seen four on a machine or two) which go the the motherboard front panel header block (as already mentioned). There is no polarity to speak of. You have to find the correct two pins which these connect to. A motherboard (or system service) manual will illustrate which pins these are. This information is usually silkscreened onto the motherboard as well. It may be hard to see, but it should be there.

 

Like the man said misconnection is the most likely option.
It's sometime hard to tell which way the switch connector goes. On some boards it plugs into pins in the same row, on some boards it plugs in across two rows. Check your manual carefully. Once you have correctly identified the pins it does not matter which way round the connector goes on them.

Studio T

 

The problem is I have 1 pin which says power (PWR) and 1 that says LED (LED ). They are separated, so its really like a really stupid guessing game to figure which one goes where. Found the manual, still no good, coz I think it refers to some 3-pin connector :\
Will play some more tomorrow....

 

Page 30 of the manual is plain enough. The power switch connects pins 6 and 8 on the front panel connector. These are adjacent to each other in the same row as numbering is even on one row and odd on the other.

Studio T

 

I've seen boards marked (silkscreened) PWR and it meant the power LED. There's usually a PWR/SW or something with SW in it. However studiot has outlined pins 6 & 8. Follow the manual.

If you have a LED connected and it isn't working (if you're sure you're on the correct pins) simply reverse the position of the connector, as LED's do have a polarity. This of course has no bearing on the PWR SW connector. As I stated, it has no polarity.