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Screen goes blank but the computer is still running.

post #1 of 9
Thread Starter 
Hi guys, I have been having this issue for quite a long time now and just wondering if i can find an answer here.

My setup:


AMD Phenom II X4 940 Black Edition

COOLER MASTER eXtreme Power 550W PSU

BIOSTAR TA790GXE MOBO

SAPPHIRE Radeon HD 5750 1GB

4GB G.SKILL 1066 DDR2

500GB 7200RPM SATA HD

OPTICAL SATA DVDR



So this screen going blank problem happens quite randomly, I will be using the computer and all of a sudden the monitor will just go blank and i can do nothing about it. The problem sometimes happens when i run a video online or when i run into a cutscene in a game or when i use photoshop and etc.

When the screen turns blank, my computer will still be running but my mouse will lose its response, i have to hard restart my computer. In a few rare cases the computer will restart by itself after awhile.

I have tried replacing the 550W PSU to a 650W one and the Radeon 5750 to Nvidia GTX460 but the problem still persist. I hope you guys can figure this out for me, this problem is driving me crazy. Thank you so much
post #2 of 9
Well since you replaced the PSU and Vid card (I don't want to say it but...) the problem most probably lies with your motherboard.

But before I jump to conclusions have you ran prime95 to test your cpu, northbridge and mems? I would try and do that first to check if your cpu is fine using small ftt then use the in place large ftt test to check if your NB is fine as well. Finally going to the blended test to see if your mems are working fine.

If you pass all tests at (...at least...) 8 hours each then I'm thinking mobo issue.
Equinox
(18 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7-4790k Asus Z97I-Plus Galaxy 780 Ti HOF Edition Kingston Hyper X Fury 16 GB 1866Mhz 
Hard DriveCoolingCoolingCooling
Crucial MX100 512 GB Corsair H55 dual fan (CPU) NZXT G10 Corsair H55 (GPU) 
OSMonitorKeyboardPower
Windows 7 Pro SP1 Asus PB278Q DK-9087 MX Red White Leds Seasonic 660X 
CaseMouseMouse PadAudio
Silverstone FT03 Logitech G400S Razer Sphex Fiio E17 / E9K 
AudioAudio
Fidelio X2 HE-400i 
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Equinox
(18 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7-4790k Asus Z97I-Plus Galaxy 780 Ti HOF Edition Kingston Hyper X Fury 16 GB 1866Mhz 
Hard DriveCoolingCoolingCooling
Crucial MX100 512 GB Corsair H55 dual fan (CPU) NZXT G10 Corsair H55 (GPU) 
OSMonitorKeyboardPower
Windows 7 Pro SP1 Asus PB278Q DK-9087 MX Red White Leds Seasonic 660X 
CaseMouseMouse PadAudio
Silverstone FT03 Logitech G400S Razer Sphex Fiio E17 / E9K 
AudioAudio
Fidelio X2 HE-400i 
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post #3 of 9
Try a new monitor? or even a tv. Could be a faulty monitor.
post #4 of 9
Can you adjust the PCIE speed in BIOS? Try raising it a few MHz
Nehalem
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 @ 4.3GHz Evga X58 3SLI 2X SLI Evga GTX 275 FTWs 756/1620/1296 6GB Mushkin Blackline 1600MHz 78720591T 
Hard DriveMonitorPower
OCZ Vertex2 60GB Sony FW900 Corsair 850TX 
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Nehalem
(13 items)
 
  
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i7 950 @ 4.3GHz Evga X58 3SLI 2X SLI Evga GTX 275 FTWs 756/1620/1296 6GB Mushkin Blackline 1600MHz 78720591T 
Hard DriveMonitorPower
OCZ Vertex2 60GB Sony FW900 Corsair 850TX 
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post #5 of 9
memory? memtest?

I had this problem and it turned out to be the video card after replacing memory, psu, and hard drive.
new computer
(13 items)
 
  
CPUMotherboardGraphicsRAM
phenom x4 955 BE Biostar TA890FXE radeon hd 5450 4gig G.Skill NQ 1600 DDR3 
Hard DriveOptical DriveOSMonitor
500GiG Caviar Black raid 0 lg dvd burner windows 7 ultimate 23" samsung & 37" samsung tv 
PowerCase
650w ultra thermaltake v3 
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new computer
(13 items)
 
  
CPUMotherboardGraphicsRAM
phenom x4 955 BE Biostar TA890FXE radeon hd 5450 4gig G.Skill NQ 1600 DDR3 
Hard DriveOptical DriveOSMonitor
500GiG Caviar Black raid 0 lg dvd burner windows 7 ultimate 23" samsung & 37" samsung tv 
PowerCase
650w ultra thermaltake v3 
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post #6 of 9
same it 99% of the time the video card spec if your overclocking/overvolting it try running it at stock settings if your not i went throught 2 diff 470's before i got a good one
post #7 of 9
Thread Starter 
Quote:
Originally Posted by mark_thaddeus View Post
Well since you replaced the PSU and Vid card (I don't want to say it but...) the problem most probably lies with your motherboard.

But before I jump to conclusions have you ran prime95 to test your cpu, northbridge and mems? I would try and do that first to check if your cpu is fine using small ftt then use the in place large ftt test to check if your NB is fine as well. Finally going to the blended test to see if your mems are working fine.

If you pass all tests at (...at least...) 8 hours each then I'm thinking mobo issue.
I've went to test those and they are running fine, I'm going to try a new monitor to see what happens.
post #8 of 9
Can you re-seat your vid card as well. Also don't forget to check for any loose connectors / wires. Yeah a good check on the monitor would be recommended as well.
Equinox
(18 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7-4790k Asus Z97I-Plus Galaxy 780 Ti HOF Edition Kingston Hyper X Fury 16 GB 1866Mhz 
Hard DriveCoolingCoolingCooling
Crucial MX100 512 GB Corsair H55 dual fan (CPU) NZXT G10 Corsair H55 (GPU) 
OSMonitorKeyboardPower
Windows 7 Pro SP1 Asus PB278Q DK-9087 MX Red White Leds Seasonic 660X 
CaseMouseMouse PadAudio
Silverstone FT03 Logitech G400S Razer Sphex Fiio E17 / E9K 
AudioAudio
Fidelio X2 HE-400i 
  hide details  
Reply
Equinox
(18 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7-4790k Asus Z97I-Plus Galaxy 780 Ti HOF Edition Kingston Hyper X Fury 16 GB 1866Mhz 
Hard DriveCoolingCoolingCooling
Crucial MX100 512 GB Corsair H55 dual fan (CPU) NZXT G10 Corsair H55 (GPU) 
OSMonitorKeyboardPower
Windows 7 Pro SP1 Asus PB278Q DK-9087 MX Red White Leds Seasonic 660X 
CaseMouseMouse PadAudio
Silverstone FT03 Logitech G400S Razer Sphex Fiio E17 / E9K 
AudioAudio
Fidelio X2 HE-400i 
  hide details  
Reply
post #9 of 9
Loosen heatsink? (i.e. if Hyper 212+ and too tight)
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