Computer loads for a few minutes, dies, and won't load again for a while. Power on mobo issue?

Panzerknacker15

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Sep 23, 2014
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Hello,

I could use your expertise...

System build:
VGA: EVGA 01G-P3-1561-AR GeForce GTX 560 Ti FPB (Fermi)
CPU: Intel Core i5-2500K Sandy Bridge Quad-Core
Mobo: ASRock Z77 Extreme6 LGA 1155
RAM: G.SKILL Ripjaws X Series 8GB (2 x 4GB)

I built this build 2 years ago, and it has run fine until now. A few days ago, in the middle of normal use, it just died. It wouldn't power up or show any signs of life. No lights, no fans, nothing.

At my friend's house, we swapped out the PSU, and we ran it for 2 hours. Updated drivers, updated BIOS. There were a few restarts involved. Ran fine. We shut it down properly. I got it home, and it ran for 1.5 hours, and then died again. Again, no signs of life afterward. I try unplugging components from the PSU and try running to see any result, but still dead.

Yesterday, I plug it in again and it boots. I am able to load windows and log in, but it dies about a minute after the desktop loads. Then, it is unable to start again at all; again, no sign of life.

I pulled out the mobo to do a breadboard construct on it, so just mobo, CPU, CPU fan, 1 HDD, 1 RAM stick on the mobo box. No sign of life last night after the crash noted above.

This morning, the breadboard loads and runs to the same point (1 minute after desktop) and crashes. Again it won't power up afterward.


Update for this evening:

When I came home from work, I tried the breadboard construct. It ran. Windows loaded. It seemed to be running fine. I downloaded a CPU test (one from Intel), and the CPU passed. I shutdown and added my other 3 RAM sticks.

It then proceeded to run successfully for about 3 hours. I ran a virus scan (clear) and monitored temps via HWMonitor. I will paste results below. I was able to use the computer normally during this time (just internet and email in addition to the scans). Then it died.

After death, I am getting some signs of life. I read on another thread about trying to remove any remaining power in the system. So I unplug the power supply but leave it on, then hold down the power button on the motherboard for a few seconds. Afterward, I plug the power supply back in, and the computer starts up and begins loading, but again dies after a few seconds. Not sure if that means anything.


Any idea what might cause this weird chain of results? Thank you.
 

Videographer

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Sep 9, 2014
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This is sounding like a power or heat issue, I would go all out and say that it is the power on the motherboard seeing as you changed the PSU. Pull the HDD and run memtest86 on the breadboard to rule out software and the HDD (although, we know they arent faulty, we're just confirming what we know)

I think that either the CPU is overheating, or the VRM is overheating. What vcore, clock and temp is the CPU running?
 

Panzerknacker15

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Sep 23, 2014
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I will try the memtest86 when I get home tonight. I don't think it should be a heat issue as the only time it starts is after a few hours down, and it only runs for a few minutes.

I never messed with any of the CPU settings or any overclocking, so that is all default standards. Not sure about CPU temp, not sure how to determine CPU temp in the short time the computer is up.
 

Panzerknacker15

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Sep 23, 2014
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From the sound of the issue, could it be anything other than the motherboard? I'm trying to determine what components could possibly need replacement. I think I could get an RMA on the motherboard, but I want to me sure that the issue resides with the motherboard.

It doesn't seem like the power supply as it is relatively new (1 month of use) and it also was able to power up another computer after these issues presented themselves.

Thanks.
 

Panzerknacker15

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Sep 23, 2014
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Update from this evening:

When I came home from work, I tried the breadboard construct. It ran. Windows loaded. It seemed to be running fine. I downloaded a CPU test (one from Intel), and the CPU passed. I shutdown and added my other 3 RAM sticks.

It then proceeded to run successfully for about 3 hours. I ran a virus scan (clear) and monitored temps via HWMonitor. I will paste results below. Then it died.

After death, I am getting some signs of life. I read on another thread about trying to remove any remaining power in the system. So I unplug the power supply but leave it on, then hold down the power button on the motherboard for a few seconds. Afterward, I plug the power supply back in, and the computer starts up and begins loading, but again dies after a few seconds. Not sure if that means anything.

HWMonitor extract from results:
Hardware Monitors
-------------------------------------------------------------------------

Hardware monitor Nuvoton NCT6776
Voltage 0 1.04 Volts [0x82] (CPU VCORE)
Voltage 1 1.87 Volts [0xEA] (VIN1)
Voltage 2 3.36 Volts [0xD2] (AVCC)
Voltage 3 3.34 Volts [0xD1] (3VCC)
Voltage 4 0.94 Volts [0x76] (VIN4)
Voltage 5 1.74 Volts [0xD9] (VIN5)
Voltage 6 0.87 Volts [0x6D] (VIN6)
Temperature 0 38°C (100°F) [0x26] (SYSTIN)
Temperature 1 63°C (144°F) [0x7D] (CPUTIN)
Temperature 2 40°C (103°F) [0x4F] (AUXTIN)
Temperature 3 79°C (174°F) [0x4F] (TMPIN3)
Fan 1 2076 RPM [0x81C] (CPUFANIN)

Processors Information
-------------------------------------------------------------------------

Processor 1 ID = 0
Number of cores 4 (max 8)
Number of threads 4 (max 16)
Name Intel Core i5 2500K
Codename Sandy Bridge
Specification Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz
Package (platform ID) Socket 1155 LGA (0x1)
CPUID 6.A.7
Extended CPUID 6.2A
Core Stepping D2
Technology 32 nm
TDP Limit 95 Watts
Tjmax 98.0 °C
Core Speed 1599.6 MHz
Multiplier x Bus Speed 16.0 x 100.0 MHz
Stock frequency 3300 MHz
Instructions sets MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, EM64T, VT-x, AES, AVX
L1 Data cache 4 x 32 KBytes, 8-way set associative, 64-byte line size
L1 Instruction cache 4 x 32 KBytes, 8-way set associative, 64-byte line size
L2 cache 4 x 256 KBytes, 8-way set associative, 64-byte line size
L3 cache 6 MBytes, 12-way set associative, 64-byte line size
FID/VID Control yes


Turbo Mode supported, enabled
Max non-turbo ratio 33x
Max turbo ratio 37x
Max efficiency ratio 16x
Min Power 60 Watts
O/C bins unlimited
Ratio 1 core 37x
Ratio 2 cores 36x
Ratio 3 cores 35x
Ratio 4 cores 34x
TSC 3300.0 MHz
APERF 3400.6 MHz
MPERF 3227.5 MH