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Sabertooth Z77 won't power up (HELP)

post #1 of 34
8/5/12 at 12:10am
Thread Starter 
Sabertooth Z77 won't power up (HELP)

PROBLEM:
I returned home from vacation this evening and my Sabertooth Z77 build (about 2 months old) will not power up. When I hit the power button on my case the board powers up for half a second then shuts down. The board will then power back up 5 seconds later for half a second and shut down again. This cycle repeats every 5 seconds until I shut the power off at the PSU.

When the board powers up for half a second, there are no beeps and all of the fans spin up (PSU, both CPU cooler fans, both video card fans, and both MB assist fans). The case fans do not spin up. The red CPU led light as well as the cases power button also light up during the half second until the baord shuts down.

WHAT I'VE TRIED:
1. I cleared the CMOS
2. I tried a different PSU
3. I tried a different CPU cooler
4. I disconnected all my drives, both video cards, both RAM sticks, and all rear I/O connections.

At this point, I'm thinking either a bad board or a bad CPU. I'm leaning towards a bad board. The system was running rock solid before I left on vacation.

See my system specs are in my signature.

Have any of you ever come across somehting like this before? Any Suggestions? Thanks.
Edited by Squeeken - 8/5/12 at 12:21am
Sabertooth Z77
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Sabertooth Z77
(17 items)
  		  
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i7 3770K ASUS Sabertooth Z77 EVGA GTX570 16GB Corsair Vengence DDR3 1600 
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SSD: 180GB Corsair Force Series 3 WD 1TB Black WD 500GB Blue Samsung SH222BB 
CoolingOSMonitorMonitor
Corsair H100 Water Cooler Windows 7 (64bit) 24" Dell 2407WFP-HC Two 24" Dell S2409W 
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post #2 of 34
8/5/12 at 12:12am
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Quote:
Originally Posted by Squeeken View Post

Sabertooth Z77 won't power up (HELP)
PROBLEM:
I returned home from vacation this evening and my Sabertooth Z77 build (about 2 months old) will not power up. When I hit the power button on my case the board powers up for half a second then shuts down. The board will then power back up 5 seconds later for half a second and shut down again. This cycle repeats every 5 seconds until I shut the power off at the PSU.
When the board powers up for half a second, there are no beeps and all of the fans spin up (PSU, both CPU cooler fans, both video card fans, and both MB assist fans). The case fans do not spin up. The red CPU led light as well as the cases power button also light up during the half second until the baord shuts down.
WHAT I'VE TRIED:
1. I cleared the CMOS
2. I tried a different PSU
3. I tried a different CPU cooler
4. I disconnected all my drives, both video cards, both RAM sticks, and all rear I/O connections.
At this point, I'm thinking either a bad board or a bad CPU. I'm leaning towards a bad board. The system was running rock solid before I left on vacation.
Have any of you ever come across somehting like this before? Any Suggestions? Thanks.

this might sound dumb but unplug 24 pin and 8 pin for 10 secconds
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post #3 of 34
8/5/12 at 12:15am
What case? Roommate had the same exact problem, turns out that the power button on is case was held down and was causing the computer to do what you are describing. Unplug the power switch and reset cable from your mobo and manually bridge the connection to turn the computer on.


Not likely your issue, but I thought the same thing about his for an hour before i finally tried it and that ended up being the issue:rolleyes:
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post #4 of 34
8/5/12 at 12:20am
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Quote:
Originally Posted by SenorRed View Post

What case? Roommate had the same exact problem, turns out that the power button on is case was held down and was causing the computer to do what you are describing. Unplug the power switch and reset cable from your mobo and manually bridge the connection to turn the computer on.
Not likely your issue, but I thought the same thing about his for an hour before i finally tried it and that ended up being the issue:rolleyes:


ur case had a grounding issue right?
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post #5 of 34
8/5/12 at 12:36am
Thread Starter 
Quote:
Originally Posted by REPUBLICOFGAMER View Post

this might sound dumb but unplug 24 pin and 8 pin for 10 secconds

Thanks for your reply. When I swaped out the PSU, I had both those connections off for several minutes.
Sabertooth Z77
(17 items)
  		  
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i7 3770K ASUS Sabertooth Z77 EVGA GTX570 16GB Corsair Vengence DDR3 1600 
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SSD: 180GB Corsair Force Series 3 WD 1TB Black WD 500GB Blue Samsung SH222BB 
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Sabertooth Z77
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i7 3770K ASUS Sabertooth Z77 EVGA GTX570 16GB Corsair Vengence DDR3 1600 
Hard DriveHard DriveHard DriveOptical Drive
SSD: 180GB Corsair Force Series 3 WD 1TB Black WD 500GB Blue Samsung SH222BB 
CoolingOSMonitorMonitor
Corsair H100 Water Cooler Windows 7 (64bit) 24" Dell 2407WFP-HC Two 24" Dell S2409W 
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post #6 of 34
8/5/12 at 12:37am
having the EXACT same issue with my z77 maximus v gene. have given it for rma.
but try it with a psu without a dc-dc power chip. something like a seasonic s2 520. mine boots up sometimes with that.
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The Beast Within
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post #7 of 34
8/5/12 at 12:38am
Quote:
Originally Posted by REPUBLICOFGAMER View Post

ur case had a grounding issue right?

No, the power button was physically being compressed down (stuck) and caused the computer to turn on and off constantly.


The best way to rule anything like that out is to just unplug both switches and manually bridge the power pins.
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post #8 of 34
8/5/12 at 12:38am
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Quote:
Originally Posted by Squeeken View Post

Thanks for your reply. When I swaped out the PSU, I had both those connections off for several minutes.


have you checked ur molex's and all ur stuff to be sure no short ?
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post #9 of 34
8/5/12 at 12:40am
Thread Starter 
Quote:
Originally Posted by SenorRed View Post

What case? Roommate had the same exact problem, turns out that the power button on is case was held down and was causing the computer to do what you are describing. Unplug the power switch and reset cable from your mobo and manually bridge the connection to turn the computer on.
Not likely your issue, but I thought the same thing about his for an hour before i finally tried it and that ended up being the issue:rolleyes:

Thanks for your reply. That is a great idea. I hadn't thought of a potential problem with the case switch. My case is a CoolerMaster HAF XM. I tried what you suggested, but unfortunately it didn't work. When I bridged the connection by hand, the system powers up but then shuts down again in about a half a second and then goes into its 5 second loop.
Sabertooth Z77
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Sabertooth Z77
(17 items)
  		  
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SSD: 180GB Corsair Force Series 3 WD 1TB Black WD 500GB Blue Samsung SH222BB 
CoolingOSMonitorMonitor
Corsair H100 Water Cooler Windows 7 (64bit) 24" Dell 2407WFP-HC Two 24" Dell S2409W 
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post #10 of 34
8/5/12 at 12:45am
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well i can say ur not the only one
http://www.overclock.net/t/1290484/computer-will-not-boot-anymore-help-please/0_20
http://www.overclock.net/t/1290472/do-i-need-a-new-cpu/0_20#post_17865965
and theres like 4 more in the past hour
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