Pc receives power but does not boot.

On mobile so I'll keep it short as possible without leaving details out. Last night I left my pc on sleep mode. When I got our of work today I forgot it was on sleep mode and pressed the power button. I then noticed everything turn off and remembered it had been in sleep mode. After pressing the power button, there is no boot. My mic, headset, and mouse light up but there is no cpu fan spin, no beep, and definitely no display. The computer is dead silent. I've tried removing one piece of hardware at a time and had no luck.

After pulling out the power cord press the On|Off button or wait 20 seconds to assure all residual power has drained off the motherboard. Then locate the large plug on the board, either 20 or 24 conductors from the power supply and remove it. It has a clip that has to be squeezed while pulling the plug loose. Wait a few seconds and put everything back and try to boot.

Berton said:

After pulling out the power cord press the On|Off button or wait 20 seconds to assure all residual power has drained off the motherboard. Then locate the large plug on the board, either 20 or 24 conductors from the power supply and remove it. It has a clip that has to be squeezed while pulling the plug loose. Wait a few seconds and put everything back and try to boot.

Done so and nothing. Peripherals still turn on but no boot.

bro67 said:

Pull the power and CMOS battery. Possibly a bad power supply. Mom & Pop computer shops have testers to check the motherboard, power supply, etc..

Will look into testing the board and psu at a shop. It'll have to wait til next week though.

Berton said:

After pulling out the power cord press the On|Off button or wait 20 seconds to assure all residual power has drained off the motherboard. Then locate the large plug on the board, either 20 or 24 conductors from the power supply and remove it. It has a clip that has to be squeezed while pulling the plug loose. Wait a few seconds and put everything back and try to boot.

I'm not aware of anything that would be accomplished by disconnecting the ATX power connector (20 or 24 pins) from the motherboard.

Resetting the RTC (real time clock) to restore the default BIOS settings seems likelier to do something useful. As the OP hasn't given us any system details, removing the CMOS battery would be one way of doing it. There ought to be a jumper, or a pushbutton on some boards, to do that without removing the battery.

I'm a little confused, though. When I have a PC in actual sleep mode (no fans, power indicator light blinking), pressing the power button wakes the PC up.

bobkn said:

I'm not aware of anything that would be accomplished by disconnecting the ATX power connector (20 or 24 pins) from the motherboard.

Resetting the RTC (real time clock) to restore the default BIOS settings seems likelier to do something useful. As the OP hasn't given us any system details, removing the CMOS battery would be one way of doing it. There ought to be a jumper, or a pushbutton on some boards, to do that without removing the battery.

I'm a little confused, though. When I have a PC in actual sleep mode (no fans, power indicator light blinking), pressing the power button wakes the PC up.

Yeah, sorry. Working on details. It's just a little difficult to get proper formatting on mobile.

Cpu - i5-6500
Mobo - MSI-H81M
Psu - corsair hx750
Gpu - sapphire r9 290 tri-x
Ram - 2x 8GB gskill nt ddr4

Pressing the power button may wake a pc in sleep mode. I usually always did with either my keyboard or mouse. If the pc had already shut down before I got home would make more sense than the pc powering down from sleep mode I guess.

Just a thought.......hold the power button on the case down for about 5 seconds..........then after a couple seconds try to turn it back on with the power button.......

kipper said:

Just a thought.......hold the power button on the case down for about 5 seconds..........then after a couple seconds try to turn it back on with the power button.......

No go. Holding/pressing the power button down does not stop power. I'll try to word this better

Press power button and nothing happens but power on mic and headset. Once "on" passing or holding the power button doesn't turn them off. The lights stay on until I flip the switch on the psu.