PC power button no response - power indicator light on MOBO still showing green.

Pshaw

Reputable
Jan 5, 2015
2
0
4,510
So I shut down my computer to give it a break while I went to make / cook dinner. Then I remembered I need to check something and tried to boot it back up right away and nothing. No error beeps, no fans spinning up, nothing. The green power indicator light on the MOBO is still glowing green and initially all USB devices I had plugged into it were also still lit up so I'm guessing it's not the power supply or power cord. Worried it might be the MOBO dying or the power switch breaking. Is there a simple way to try and boot the PC without the case switch so I can test this? I was going to call Asus tech support but the line is busy right now. I've already take out and reseated everything in the MOBO excepting the processor. But seeing how nothing is getting power I feel it's unlikely the processor anyway. Any thoughts?
 
Solution
First make sure all power (and data) cables, DIMM"s and video card(s) are seated firmly/properly. Try booting again using the case power switch.

If the computer still does not boot, then the computer can be booted up by bypassing the case power switch.

Slide the case power switch connector off the corresponding motherboard pins. Then using a metal object such as a screwdriver blade or something similar, briefly short the case power switch pins on the motherboard using the metal object (and being careful not to touch anything else!). This should get the computer to boot up.

If the computer fails to boot, try shorting the power switch pins on the motherboard again. If still no boot, then there may be a PSU and/or a motherboard issue.
First make sure all power (and data) cables, DIMM"s and video card(s) are seated firmly/properly. Try booting again using the case power switch.

If the computer still does not boot, then the computer can be booted up by bypassing the case power switch.

Slide the case power switch connector off the corresponding motherboard pins. Then using a metal object such as a screwdriver blade or something similar, briefly short the case power switch pins on the motherboard using the metal object (and being careful not to touch anything else!). This should get the computer to boot up.

If the computer fails to boot, try shorting the power switch pins on the motherboard again. If still no boot, then there may be a PSU and/or a motherboard issue.
 
Solution

Pshaw

Reputable
Jan 5, 2015
2
0
4,510
I'm using an ASUS Sabertooth x58 MOBO - I'm looking at this diagram and it simply lables all the fan power and the PC chassis power ports #2. So before I go trying to short things out can anybody help me out with which port I should be shorting here? Asus just wants to do an RMA on it but I really can't be without a PC for 2+ weeks while I wait on shipping and repairs...
 
The case power switch connector (with two wires coming out of it which go to the case power switch) is located on the motherboard. The connector is quite small, (usually) black colored, made of plastic and is rectangular shaped with the text "POWER" or "PWR SW" or something similar written in white on one side of the connector.

It is located at the far end of the motherboard opposite the DIMM slots. Refer to page 2-36 of your motherboard manual for detailed location.

This connector should slide off the corresponding pins on the motherboard. It is these now exposed pins (PWR and Ground) on the motherboard that need to be shorted.