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Computer Sometimes Starts...

post #1 of 7
Thread Starter 
So my comptuer won't always turn on the first time, I go to push the power button, it starts up for .5seconds, then shuts off. I can keep pushing the button, and one of the times, it will start up and run normally for hours.

Already replaced the motherboard, same issue.....suggestions?
My System
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel 4690k 3.5ghz Asrock Z97E-ITX/ac Sapphire 270X Vapor X Kingston HyperX 2x2gb 1600mhz 
Hard DriveOptical DriveOSMonitor
250gb Samsung 850 Pro SATA LG DVD Burner Windows 8.1 Professional X64 23" Asus 144hz 
KeyboardPowerCaseMouse
Microsoft Ergonomic 4000 EVGA 500w Gold EVGA Hadron Air Logitech G400 
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My System
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel 4690k 3.5ghz Asrock Z97E-ITX/ac Sapphire 270X Vapor X Kingston HyperX 2x2gb 1600mhz 
Hard DriveOptical DriveOSMonitor
250gb Samsung 850 Pro SATA LG DVD Burner Windows 8.1 Professional X64 23" Asus 144hz 
KeyboardPowerCaseMouse
Microsoft Ergonomic 4000 EVGA 500w Gold EVGA Hadron Air Logitech G400 
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post #2 of 7
It could be the PSU. I had a bad PSU in a PC that did the same exact thing. Reading this LINK will be a good start on learning how to test your PSU.
300R
(16 items)
 
Phenom M
(12 items)
 
 
CPUMotherboardGraphicsRAM
2500k Asrock Extreme 3 Gen 3 560ti 8GB 1600mhz 
Hard DriveCoolingOSMonitor
Agility 3 Watercooled Windows 7 QNIX 1440p 
MonitorKeyboardPowerCase
19" Dell CM Quickfire Rapid Blue Keys Kingwin STR-500 300R 
MouseMouse PadAudioAudio
Mionix Naos 3200 Func Industries 1030 Z-5500 Sennheiser HD 280 Pro 
CPUMotherboardGraphicsRAM
4670K Z87M Extreme 4 290 PNY 8 GB 
Hard DriveCoolingOSMonitor
OCZ Agility 3 240GB SSD Corsair AIO Win 7 Qnix 1440p 
KeyboardCaseMouseAudio
Quickfire Rapid (Blues) Prodigy M Mionix Naos 3200 Sennheiser HD280 
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300R
(16 items)
 
Phenom M
(12 items)
 
 
CPUMotherboardGraphicsRAM
2500k Asrock Extreme 3 Gen 3 560ti 8GB 1600mhz 
Hard DriveCoolingOSMonitor
Agility 3 Watercooled Windows 7 QNIX 1440p 
MonitorKeyboardPowerCase
19" Dell CM Quickfire Rapid Blue Keys Kingwin STR-500 300R 
MouseMouse PadAudioAudio
Mionix Naos 3200 Func Industries 1030 Z-5500 Sennheiser HD 280 Pro 
CPUMotherboardGraphicsRAM
4670K Z87M Extreme 4 290 PNY 8 GB 
Hard DriveCoolingOSMonitor
OCZ Agility 3 240GB SSD Corsair AIO Win 7 Qnix 1440p 
KeyboardCaseMouseAudio
Quickfire Rapid (Blues) Prodigy M Mionix Naos 3200 Sennheiser HD280 
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post #3 of 7
Thread Starter 
Quote:
Originally Posted by Namkab View Post

It could be the PSU. I had a bad PSU in a PC that did the same exact thing. Reading this LINK will be a good start on learning how to test your PSU.

I have a PSU tester, and all lights were green!
My System
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel 4690k 3.5ghz Asrock Z97E-ITX/ac Sapphire 270X Vapor X Kingston HyperX 2x2gb 1600mhz 
Hard DriveOptical DriveOSMonitor
250gb Samsung 850 Pro SATA LG DVD Burner Windows 8.1 Professional X64 23" Asus 144hz 
KeyboardPowerCaseMouse
Microsoft Ergonomic 4000 EVGA 500w Gold EVGA Hadron Air Logitech G400 
  hide details  
Reply
My System
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel 4690k 3.5ghz Asrock Z97E-ITX/ac Sapphire 270X Vapor X Kingston HyperX 2x2gb 1600mhz 
Hard DriveOptical DriveOSMonitor
250gb Samsung 850 Pro SATA LG DVD Burner Windows 8.1 Professional X64 23" Asus 144hz 
KeyboardPowerCaseMouse
Microsoft Ergonomic 4000 EVGA 500w Gold EVGA Hadron Air Logitech G400 
  hide details  
Reply
post #4 of 7
Does this happen if your system is idle for awhile? I know that the Asus Sleep mode has bug and sometime won't let me system boot.
Once again...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.28GHz, HT] Asus P6T + Broadcom NetXtreme II VisionTek HD5850 [900/1200] + Galaxy GT240 2x4GB G.Skill Ripjaw X [1632 MHz] 
Hard DriveOSMonitorKeyboard
Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
PowerCaseMouseMouse Pad
Antec Truepower New 750W Li Lian PC-V2100 [10x120mm fans] Logitech G9 X-Trac Pro 
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Once again...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.28GHz, HT] Asus P6T + Broadcom NetXtreme II VisionTek HD5850 [900/1200] + Galaxy GT240 2x4GB G.Skill Ripjaw X [1632 MHz] 
Hard DriveOSMonitorKeyboard
Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
PowerCaseMouseMouse Pad
Antec Truepower New 750W Li Lian PC-V2100 [10x120mm fans] Logitech G9 X-Trac Pro 
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post #5 of 7
Or could be something very mundane, like start button sticking. Found that out few times. Disconnect it from MB and swap it with reset button, they work the same.
post #6 of 7
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post

Does this happen if your system is idle for awhile? I know that the Asus Sleep mode has bug and sometime won't let me system boot.
Nope, it's 100% fine once it boots lol.
Quote:
Originally Posted by MishelLngelo View Post

Or could be something very mundane, like start button sticking. Found that out few times. Disconnect it from MB and swap it with reset button, they work the same.

I've tried this trick too! Not my first rodeo. This one is stumping me tho.

Only thing I can think of is something is shorting maybe? I have standoffs, but maybe not all of them and something is touching possibly?
My System
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel 4690k 3.5ghz Asrock Z97E-ITX/ac Sapphire 270X Vapor X Kingston HyperX 2x2gb 1600mhz 
Hard DriveOptical DriveOSMonitor
250gb Samsung 850 Pro SATA LG DVD Burner Windows 8.1 Professional X64 23" Asus 144hz 
KeyboardPowerCaseMouse
Microsoft Ergonomic 4000 EVGA 500w Gold EVGA Hadron Air Logitech G400 
  hide details  
Reply
My System
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel 4690k 3.5ghz Asrock Z97E-ITX/ac Sapphire 270X Vapor X Kingston HyperX 2x2gb 1600mhz 
Hard DriveOptical DriveOSMonitor
250gb Samsung 850 Pro SATA LG DVD Burner Windows 8.1 Professional X64 23" Asus 144hz 
KeyboardPowerCaseMouse
Microsoft Ergonomic 4000 EVGA 500w Gold EVGA Hadron Air Logitech G400 
  hide details  
Reply
post #7 of 7
Quote:
Originally Posted by kaivorth View Post

Nope, it's 100% fine once it boots lol.
I've tried this trick too! Not my first rodeo. This one is stumping me tho.

Only thing I can think of is something is shorting maybe? I have standoffs, but maybe not all of them and something is touching possibly?

Came here to say that, it happened to me once, one of the standoffs was touching the motherboard and causing it to reset once and then turn off.
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