Brand new build, NO POWER after 3 days working fine

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Vafran

Honorable
Oct 28, 2013
3
0
10,510
Hello, I just built a new computer and it was working absolutely fine for 3 days, and just now out of the blue it will not power on.

Just the top fan of the ANTEC tower moves a bit for a fraction of second, and some leds in the MOBO are also lit for the same amount of time, along with the diagnostic leds of the MOBO (GA-Z77X-UD5H). So I tried power from the built in power button in the mobo, same result. Actually it only responds for this fraction of second on the first attempt. It only responds again if power is removed and connected back.

I removed all components, leaving only MOBO and PSU, same thing happens.

I do not understand what could have happened between yesterday and today to fry my new computer!

Question is PSU or MOBO is faulty?
 
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Vafran

Honorable
Oct 28, 2013
3
0
10,510
[strike]I figured it out.

When I assembled the computer with the mess of all the power cables I connected by mistake one of the pin PCI express power cables to the PSU itself, in the slot for additional power, so it was kind of sending power to itself? I do not really know, but after changing that everything is fine.

Somehow it was working fine for three days under that condition. I believe that the PSU was charged with static or something like that.

Thanks anyway Tiny voices for the interest shown :)[/strike]
 
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V

Vafran

Honorable
Oct 28, 2013
3
0
10,510
Sorry I need to make a big correction. It was the DVD power connector going to the PSU connector for peripherals, I did not connect it this time, and when connected it failed again.

Unplugging the cable did not solve so I removed the MOBO battery and it worked, when connecting again the cable everything works including the DVD.

I am afraid it will fail again, and it has something to do with the CMOS battery, as with just a CMOS reset ti did not solve, I had to remove the battery. Any idea what could be wrong?



This is my build:

- Intel Core i5 3350P - 3.1 GHz - 4 cores - LGA1155 Socket - Box, CPU Processor
- Gigabyte Z77X-UD5H Motherboard Core i3/i5/i7/Pentium/Celeron Socket LGA1155 Intel Z77 Express ATX RAID Gigabit LAN, Motherboard
- Kingston HyperX 8GB (2x4GB) Memory Kit 1600MHz DDR3 Non-ECC CL9 240-pin DIMM with Intel XMP Support, Memory
- Kingston SSDNow V300 240GB SATA 3 2.5 inch Solid State Drive with Adapter, Hard Disk / Drive
- MSI Nvidia GeForce GTX 760 Graphics Card 2GB GDDR5 1006MHz (2x DVI) DisplayPort HDMI, Video / Graphics Card
- Corsair TX750 Enthusiast Series 750 Watt ATX PS/2 Power Supply Unit (80 Plus Certified), Power Supply
- DRW-24F1ST/BLK/B BULK SILENT 24X DVD RECORDER SATA BULK, Optical Drive
- Western Digital, Caviar Black 1TB 3.5" Internal Hard drive, SATA 6Gb/s (SATA 3) 64MB Cache, Hard Disk / Drive
- Antec Three Hundred Two - - tower - ATX - no power supply ( ATX / PS/2 ) - USB/Audio, Computer Case

Thanks.
 
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