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Losing hair over issues with... motherboard?

post #1 of 3
Thread Starter 
SPECS: ASRock Z77 Extreme4, 3570k, G.Skill ARES 1866 2x8GB , Powercolor 7870 Tahiti

In short: Used computer since March '12. 3 months ago, computer turned off abruptly during Borderlands 2. No BSOD, cold shutdown.

Since then, it did not boot. Only fans would spin, no lights, no beeps nothing. Dr. Debug (the little LED diagnostic on the board) shows nothing ever.

I RMA'd the board through ASRock and they've supposedly replaced it. However, I'm having the same exact issue with the replacement.

Before getting into serious diagnostic mode, I made sure to disconnect everything except the bare essentials. Only kept the 24pin, 6pin, CPU, CPU fan, RAM, onboard video plugged in.

Here's what I tried:Tried swapping memory into every conceivable slot configuration. Tried known working memory from another computer. Swapped out the case in case of shortage(and the CPU heatsink when using the replacement board, not that it matters much). Tried using the 4-pin CPU power instead of 6-pin. Reset CMOS via every method possible (jumper, battery, clear cmos button). Nothing works...

I've tested the PSU and memory in another computer and it works fine.

I just don't know where to go from here... could it still be the motherboard? The people at ASRock said they tested it and booted it into Windows before sending back to me.

I have no idea what to do now. Please help if you can.
post #2 of 3
It seems you have systematically changed out everything leaving only the motherboard or cpu. Are you sure your PSU is big enough to handle your system?

Take a look at your cpu and make sure no thermal paste is on the PCB board contacts off to the side of the CPU die. I have had an issue where it wasn't making ground an not allowing the system to post. I doubt this is your issue as it was once working but maybe the thermal paste spread after heating up a few cycles.

If possible i would test the CPU in another system. It a good practice to write down your serial number of the component when RMA'ing or marking it in some fashion.
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I7 5820k
(15 items)
 
I7 920
(12 items)
 
 
CPUMotherboardGraphicsRAM
I7 5820k 4.65 @ 1.24V MSI x99a sli krait EVGA 980Ti 06G-P4-4995-KR  16GB G.SKILL Ripjaws DDR4 3000 (4x4gb)  
Hard DriveHard DriveCoolingCooling
SAMSUNG 840 EVO 500g (3) WD Caviar Black 1TB  Watercool Heatkiller IV CPU block XSPC RX480 Quad Radiator 
CoolingOSMonitorKeyboard
8x GentleTyphoon AP-15 Windows 7 64bit Overlord Tempest IPS 27" X270OC Logitech G15 
PowerCaseMouse
CORSAIR AX1200 Corsair 700D + side window Logitech G500 
CPUMotherboardGraphicsRAM
i7 920 @ 3.8 EX58-UD3R Sapphire 7950 G.SKILL 6GB DDR3 1600 
Hard DriveCoolingOSPower
2x WD Caviar Black 1TB Raid 0 TRUE 120mm Black Heatsink Win 7 EVGA 650W 
Case
Antec Nine Hundred 
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post #3 of 3
Were you using a 6pin or are you meaning to say the 8pin plug? Also how do you have the pc plugged in? Do you have it running thru a power strip or what? Could be the problem
jeffro37
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jeffro37
(14 items)
 
755 websurfer
(9 items)
 
 
CPUMotherboardGraphicsRAM
I5-2500k MSI Z77A-G45 EVGA 780 sc Kingston Hyper X Genises 1600mhz 
Hard DriveHard DriveOptical DriveCooling
Samsung 840  Seagate 750gb sata III Samsung 24x DVD-RW Corsair H100 
OSMonitorKeyboardPower
Windows 10 pro Samsung 26" LCD Logitec 520 (wireless) Corsair TX 750 
CaseMouse
Coolermaster HAF X Logitec laser 
CPUMotherboardGraphicsRAM
Intel c2d e7400 xFx 750i sli ext. Evga 660 sc Kingston ddr2 800 
Hard DriveCoolingOSPower
WD 250 gb  hyper 212+ Windows 7 64 ultimate/ Ubuntu 13.04 Ultra X3 600w / full modular 
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Coolermaster Storm Enforcer 
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