Motherboard power light (PS_SW) is flashing and system wont boot up

The problem is in the thread title; normally my PS_SW light stays a solid yellow and I'm able to boot up no problem. After moving my computer around the house a bit, when I plugged everything in the light was flashing yellow and is now unable to boot up. All the build information (including motherboard info) is in my profile. I looked through the manual for my motherboard (available here: GIGABYTE - Motherboard - Socket 1155 - GA-Z77X-UD5H (rev. 1.0) ) and it was totally useless. It does not seem to be blinking in any pattern, just a steady blink on and off. Any assistance would be greatly appreciated--I'm really out of my depth here.

Check inside the computer to see if any connections came loose or unplugged.

Yeah, I've tried that. This actually happened a couple weeks ago and was solved by my lightly pressing on the processor heatsink. I've tried gently testing every component though and it hasn't changed.

Zibeltor said:

Yeah, I've tried that. This actually happened a couple weeks ago and was solved by my lightly pressing on the processor heatsink. I've tried gently testing every component though and it hasn't changed.

Yikes.

That sounds like the CPU isn't making good connections. I've never had that happen.

I suppose that you could remove the heatsink and CPU, and then re-install them. Seems unlikely. Did you drop the case at any time during the moves?

No, I thought I was very gentle with the case. That seems like a reasonable next step though; I'll try reinstalling the processor in the morning. Thank you for the advice! Happy New Years!

It could be your ram has died my pc did that a week ago got some new ram and it worked again

Alright, well, I may do that. Reinstalling the processor didn't change anything. Are there any other recommendations? I'm kinda hesitant to just start buying/testing parts without really knowing what the issue is.

I recently had a problem something similar to you. I did manage to get my computer to work great for awhile. It only worked for a short time before finally dieing on me. After trying everything including different ram and a new power supply I figured it was either the motherboard and/or the cpu. The only thing that would power on was the fans. I didn't even get the beeps when I tried starting the computer with the ram removed. I hope yours is cheaper to fix than what mine was.

Reseat the RAM modules and any add-in card/s. Blow the dust out [take it outside], these can cause issues as can a bit of corrosion [usually unseen] on the contacts of anything that plugs in.

I did buy some new RAM and did as Berton recommended--reseating all my cards and blowing them out with compressed air before putting them back in. I also tested both sets of RAM modules on my board. Based off Winuser's input, the process of elimination leads me to think it's my mobo or CPU. My PSU is fairly newly installed. I felt like I've been wanting an upgrade for my CPU anyway. Can anyone recommend a reliable, durable board for a 5th generation processor (thinking abut getting the Intel Core i7-4790K). I've seen someone recommend the ASROCK Z97 Extreme9, but that's pretty pricey/difficult to find.