Power problems after unplugging PC

[Locutus494]

I went on vacation two weeks ago and unplugged my computer to protect it from surges, save power, etc. When I returned home and tried to use it last Monday, it will not power up correctly. All I did was shut off the switch on the PSU and unplug the power strip it's plugged into from the wall (I didn't open it up or move it at all), and it sat unplugged for six days. When I plugged it back in and turned on the PSU, the lights on the motherboard just flash fast and cut out constantly, not the steady (breathing-like effect) cycle they usually do when the computer is plugged in but powered off. Nothing happens when the power or reset buttons are pressed. Everything else plugged into the same outlet/power strip works fine, I have moved the computer to a different outlet on a completely different circuit in the house, and tried powering it up with all the peripherals disconnected, but no change. I hope I don't have a PSU problem! Any help anyone can give is much appreciated! My build is at the bottom of this post, and here's a link to a video of what's happening: https://youtu.be/b0x_qfwwqo8

 

Here's a link that shows what this motherboard should look like: https://www.youtube.com/watch?v=T1P1zkZmZpc

 

I've completely disassembled my computer (it BADLY needed cleaning and the cooling loops flushed anyway) and attempted to run the mobo with just the CPU and RAM in it and nothing else (including the front panel connectors) hooked up. It still behaves the same. I noticed that the blue light coming on and off by the DIMM slots is the standby light, which should be solid on when the system is powered but turned off. Could the fact that it's switching on and off mean that the system is trying to constantly power up and then off right away? I've also already tried replacing the CMOS battery which didn't help (the old one meters as still fully charged). The power supply 24-pin connector meters with the correct voltages.

I've already posted this on the EVGA forums, and didn't get much traffic. Hopefully more people see this here.

My system: Digital Storm Hailstorm (Corsair 800D), EVGA X58 Classified 3, Intel Core i7 Extreme Edition 990X 3.46GHz Six-Core, 24GB Kingston HyperX T1 1600MHz DDR3, 2x EVGA GTX 780 Dual Classified Hydro Copper, 30" Dell U3011 2560x1600, 2x 600GB Intel 320 SSD RAID 0 (OS), 2x 2TB Western Digital Black Edition 7200 RPM 64MB Cache RAID 0 (data), Sound Blaster X-Fi Titanium Fatal1ty Champion, 1200W Tech NPS, Windows 10 Pro 64-bit.

[Locutus494]

Bump.

 

Anyone got any ideas?

[SparkzMan9]

I have an ideia, do you live in a high humity place? Because if u did so the psu is probably to wet to work proprely no broken just a tiny short that prevents her from doing the full cycle, now there is a way of fixing this, is making the psu work with a jumper for about 5 min so it warms up a bit and hopefully gets back to normal. Btw putting a jumper on your psu to see if the fan spins its a good way of checking her vital signs so id start from there. here is a link 

If u have a multimeter you can do more testing on your psu to check if its working well, but if u have one u already know how eletricity works so no point on explaining. Good Luck

PS: id use rubber gloves or rubber shoes to keep my self isolated.

 

[Locutus494]

I've already done this and metered the 24 pin connector. The PSU checks out.

[SparkzMan9]

9 minutes ago, Locutus494 said:

I've already done this and metered the 24 pin connector. The PSU checks out.

Have u pressed the power on button for 30 sec?

[SparkzMan9]

2 minutes ago, SparkzMan9 said:

Have u pressed the power on button for 30 sec?

Also try to remove the 3v battery and try to turn it on then put it back on.

[Locutus494]

Done all those.

[SparkzMan9]

17 hours ago, Locutus494 said:

Done all those.

Have you tried using a difrent power cord? Did u actually check all pins of the motherboard power cable and cpu?
Also clean the ram contact cooper with a rubber.

[Locutus494]

Well, I think I found the problem. I finally noticed a microchip that is missing off the board! Right next to SATA ports 0/1, the microchip labelled "Q77" is missing. Looks like the solder points just gave up. I've looked all over in my room, but I can't find the chip. Pictures are attached.

I hope this is something that EVGA can repair if I RMA them my board. I can't imagine why it just suddenly fell off; I didn't move or change anything on my computer.

[Locutus494]

Well, I was mistaken again! No chip was missing after all (thank God!) The pictures on the spec sheet and manual show that is just a blank spot that is unused. Turns out it was my power supply all along! Everything metered good on it, but a different PSU (for which I had to take it to a computer shop) worked fine. The guy there said there is some logic or detection on the 8-pin EPS connector, and that the PSU wasn't responding right. So I've got a new Corsair HX1200 on the way from Newegg to replace the no-name "TechNPS" branded bad PSU. I guess it's actually impressive that an unknown PSU lasted seven years at all. Silver lining: I guess it will be nice to upgrade to a fully modular PSU.