No sign of power to computer

[meyerse]

I have NO signs what so ever to the system, no lights, no beeps nothing.
The following is the steps I've tried.

Note: I just moved back from overseas, the computer was in storage for many months, but was working fine for the last 5 months.

System configuration when it stopped working (wife was using it when it shut off twice with a message she did not record, third time it wouldn't turn on at all.

Memory
1 x G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) Desktop Memory Model F3-1866C9D-16GXM

Motherboard
1 x GIGABYTE GA-Z68XP-UD4 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard

CPU
1 x Intel Core i7-2700K Sandy Bridge Quad-Core 3.5GHz (3.9GHz Turbo) LGA 1155 95W Desktop Processor Intel HD Graphics ...

CPU Cooler
1 x COOLER MASTER V8 RR-UV8-XBU1-GP 120mm Rifle CPU Cooler Compatible with Intel 1366/1155/775 and AMD AM3/AM2+/AM2

POWER SUPPLY
1 x Cooler Master Silent Pro M - 850W Power Supply with 80 PLUS Bronze Certification and Semi-Modular Cables

VIDEO Card
1 x EVGA SuperClocked 01G-P3-1461-KR GeForce GTX 560 (Fermi) 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support ...

PRIMARY HARD DRIVE (SOLID STATE DRIVE)
1 x OCZ Vertex 3 VTX3-25SAT3-90G 2.5" 90GB SATA III MLC Internal Solid State Drive (SSD)

CASE
1 x Cooler Master HAF 932 Advanced - High Air Flow Full Tower Computer Case with USB 3.0 and All-Black Interior

DVD/BLU RAy
1 x ASUS Black Blu-ray Burner SATA BW-12B1ST/BLK/G/AS


Computer showed NO sign of life at all, no lights no beeps no fan at the power supply.

When It stopped working, the power supply was under warranty so I simply sent it back (was in a hurry and this seemed the most logical issue). They sent me a NEW power supply (in shrink wrap, looks like it had never been used and is 1000W so same model now but more power. Plugged it in STILL nothing.

Pulled all the power connections and put a paperclip to pins 15 and 16, flip the switch and the power supply comes on. Plug it back in, nothing.

Change the CMOS battery, Nothing.

Pull the power switch leads, put a paper clip across them, flip the switch, nothing.

Thinking then that only leaves the motherboard, I purchase this. motherboard

1 x ASRock Z77 Extreme3 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard

Fully install it and all the components, nothing.
pull the memory, nothing.
pull all the drive SATA cables, nothing.

Thoughts?

 

[jaredseg]

That's really wierd, have you tried a different power cord?

 

[Maxut Karaman]

did you test the new motherboard outside the case? this should be the first test to find that new psu and new motherboard deff working. if they do work tear apart everything left in the case something must be short circuiting and put back in. usually the add on fans or card readers fan controllers other fancy stuff?

 

[meyerse]

I tried a different power cord, nothing.
I pulled everything but the MB and the Power supply in the case (and remember this is the second motherboard, so I had to rip it out the first time).
Nothing

 

[Maxut Karaman]

did you forget 4 or 8 pin motherboard power? this is the thing most people forget but you should just take outside the new motherboard and new psu and attach only the cable to monitor and test. if it works rest of the stuff in the case suspicious.

 

[meyerse]

No, I have the 8 pin connector to the CPU power.
So you suggest pull the PSU and motherboard and NOTHING else plugged in except the monitor? How to I power it up without the switch?

 

[boosted1g]

Just have motherboard/cpu/memory on bench with power supply hooked up to it, a monitor and keyboard.

If that works then it is a standoff or some other device causing a short.

 

[meyerse]

Do I have to have a keyboard and monitor?
I don't have a keyboard that isn't wireless.....I just want to see if it tries to post.

 

[boosted1g]

Would plug in monitor just to make sure it POSTS fine or if there are any warning messages, but no a keyboard is not required with modern motherbaords.

 

[Maxut Karaman]

yeah didnt point it out but you can short the pins which the power switch connector connects usually +PW- writes on them.

 

[meyerse]

I did that with the power switch on both the old and new motherboard, so I'll do the same when I pull it all.

 

[meyerse]

This worked.
Questions now remain what the issue might be
Will strip and install part by part.
Wonder if the old MB was really bad?

 

[Maxut Karaman]

in that case test old motherboard same way. you can sell it to save some cash or send new one back.

now do all outside add part by part all the peripherals then do a good cleaning inside the case then put back all in if everything is working outside.