[SOLVED] Computer sometimes won't start until I disconnect power

[timgolden1]

Since I built this system in 2013 it's had an occasional problem where when I go to power it on or wake from sleep the power light blinks and the fans spin for about a half second then it won't do anything even if I push the power button again. The lights on the motherboard stay lit. The only way to get it to run is to either unplug or flip the switch on the power supply and wait until all the lights go off then give it power and try to turn it on again. Sometimes it takes more than one try of this, but eventually it will turn on and boot up fine.

After it is powered on it will stay on no matter how much load is placed on the CPU or graphics. I've tried clearing cmos, updating the bios and all the usual things, but the problem persists. Any ideas?

 

[COLGeek]

This is often the sign of a failing PSU. What are the specs for this system? Need the make/model of your components, particularly the power supply (PSU).

 

[timgolden1]

Specs are:

Gigabyte GA-Z87X-UD3H
i7 - 4770k
Rosewill 630-Watt Green Series 80 PLUS Certified Power Supply RG630-S12 Black
Crucial Ballistix Sport 16GB Kit (8GBx2) DDR3 1600 MT/s (PC3-12800) CL9 @1.5V UDIMM 240-Pin Memory
EVGA GeForce GTX 660 SUPERCLOCKED 2048MB GDDR5 DVI HDMI DP Graphics Card 02G-P4-2662-KR
Samsung 840 Evo 250GB
Cooler Master Hyper 212 EVO - CPU Cooler with 120mm PWM Fan (RR-212E-20PK-R2)

 

[COLGeek]

I would suspect that the PSU is the issue. Do you have access to another to swap for troubleshooting?

Is anything overclocked (more than the factory OCed GTX 660)?

 

[timgolden1]

I think I have an old 450w PSU laying around. Not sure if that is enough power, but I'll give it a try. Nothing else is overclocked.

 

[COLGeek]

You can also pull your GTX 660 and use the integrated video if you only have the 450w PSU to work with. The older GTX 660 would be the other thing to look at. Before swapping the PSUs you could remove the 660 and see if the system stabilizes.