Computer repeatedly reboots - Techist - Tech Forum

Go Back   Techist - Tech Forum > Computer Hardware > Monitors, Printers and Peripherals
Click Here to Login
Closed Thread
 
Thread Tools Display Modes
 
Old 10-12-2007, 05:18 PM   #1 (permalink)
Monster Techie
 
SirCyber's Avatar
 
Join Date: Sep 2007
Location: In a yellow Submarine
Posts: 1,113
Send a message via Yahoo to SirCyber
Angry Computer repeatedly reboots

well, I'm using my cousin's computer after a complete system clean, and the issue was not resolved in whole. this pc (I'm on it right now) reboots frequently, without warning. I went into the setup screen, and got my CPU and System temps, they are (respectfully) 50 C (122 F) and 33 C (93 F). there are no virus's, I know the outlet is good because I am running another computer off the same outlet, different power strip. what could it be? it's practically new, built Jan 06. any advice or anything i can do to check it out
__________________

__________________
EVGA X58 Classified, EVGA GTX 275 CO-OP Edition, Intel Core i7 230@2.68GHz, 1080W Enermax Evolution, 6GB G-Skill DDR3@8-8-8-19

Quote:
Originally Posted by Mak213
Knowledge is power. Power is nothing if it is not shared.
SirCyber is offline  
Old 10-12-2007, 05:56 PM   #2 (permalink)
Monster Techie
 
SirCyber's Avatar
 
Join Date: Sep 2007
Location: In a yellow Submarine
Posts: 1,113
Send a message via Yahoo to SirCyber
Default Re: Computer repeatedly reboots

anyone?
__________________

__________________
EVGA X58 Classified, EVGA GTX 275 CO-OP Edition, Intel Core i7 230@2.68GHz, 1080W Enermax Evolution, 6GB G-Skill DDR3@8-8-8-19

Quote:
Originally Posted by Mak213
Knowledge is power. Power is nothing if it is not shared.
SirCyber is offline  
Old 10-12-2007, 06:35 PM   #3 (permalink)
Monster Techie
 
SirCyber's Avatar
 
Join Date: Sep 2007
Location: In a yellow Submarine
Posts: 1,113
Send a message via Yahoo to SirCyber
Default Re: Computer repeatedly reboots

bumpbump
__________________
EVGA X58 Classified, EVGA GTX 275 CO-OP Edition, Intel Core i7 230@2.68GHz, 1080W Enermax Evolution, 6GB G-Skill DDR3@8-8-8-19

Quote:
Originally Posted by Mak213
Knowledge is power. Power is nothing if it is not shared.
SirCyber is offline  
Old 10-12-2007, 07:21 PM   #4 (permalink)
Monster Techie
 
SirCyber's Avatar
 
Join Date: Sep 2007
Location: In a yellow Submarine
Posts: 1,113
Send a message via Yahoo to SirCyber
Default Re: Computer repeatedly reboots

anyone able to help? I just switched computers due to the other one's inability to stay on grrrr
__________________
EVGA X58 Classified, EVGA GTX 275 CO-OP Edition, Intel Core i7 230@2.68GHz, 1080W Enermax Evolution, 6GB G-Skill DDR3@8-8-8-19

Quote:
Originally Posted by Mak213
Knowledge is power. Power is nothing if it is not shared.
SirCyber is offline  
Old 10-12-2007, 07:37 PM   #5 (permalink)
Retired.
 
peterhuang913's Avatar
 
Join Date: Dec 2005
Location: Los Angeles, California
Posts: 8,076
Send a message via AIM to peterhuang913
Default Re: Computer repeatedly reboots

Reseat video card, memory, cables. Make sure the heatsink is FIRMLY on.
__________________


My computer uses 1.5A-load, .8A-idle, .65A-standby, .05A-turned off on 125V.
"The spaces between your fingers were created so that another's could fill them in."
Quote:
Originally Posted by Norcent View Post
I need to stop using the internet.
peterhuang913 is offline  
Old 10-12-2007, 08:47 PM   #6 (permalink)
Monster Techie
 
SirCyber's Avatar
 
Join Date: Sep 2007
Location: In a yellow Submarine
Posts: 1,113
Send a message via Yahoo to SirCyber
Default Re: Computer repeatedly reboots

everything seems to be firmly in place, drivers are all updated and current, just lost it again. tried all you said. finally, after several times of it rebooting, it came up with a blue screen of death, saying something referenced the memory incorrectly. restarted the computer, and it just ran splash and post, then rebooted. hard killed, immediately turned back on, and started with Last Known Configuration, stayed on for maybe 15 minutes, start multitasking and it's down again. hope this helps some, cuz it doesn't help me any
__________________
EVGA X58 Classified, EVGA GTX 275 CO-OP Edition, Intel Core i7 230@2.68GHz, 1080W Enermax Evolution, 6GB G-Skill DDR3@8-8-8-19

Quote:
Originally Posted by Mak213
Knowledge is power. Power is nothing if it is not shared.
SirCyber is offline  
Old 10-13-2007, 12:23 AM   #7 (permalink)
Super Techie
 
Join Date: Sep 2005
Posts: 422
Send a message via AIM to Kubel
Default Re: Computer repeatedly reboots

Most likely culprits are memory and PSU. Before we start standard troubleshooting (pulling the system down to bare essentials and building one by one and testing after each addition), you probably want to test the worse case scenario first (a bad PSU), because if this thing fries, you can take out a number of hardware devices.

PSU testing will require you to free up a 4-pin molex and your aux so they are within testing reach, as well as breaking out a good multimeter, I prefer digital with small probes for computer work.

12v: Put red probe in yellow wire, black probe in black wire of 4-pin molex.
5v: Put red probe in red wire, black probe in black wire of 4-pin molex.
3.3v: Put red probe in orange wire, black probe in black wire of aux.

When I say wire, I mean the actual plug that the wire ends at, not jabbing the probe into the wire sheath . Generally, you want to test your voltages at all stages of computing (at POST, in BIOS, when Windows starts up, shuts down, idle, under load, etc...). At any stage, your voltages should be within the following ranges:

3.3V: 3.14V to 3.47V
5V: 4.75V to 5.25V
12V: 11.4V to 12.6V

If you go above or below these standard ranges, it means your PSU isn't falling within the specifications for an ATX PSU. Computer hardware is built to operate within these ranges. Any PSU that is out of these specs should probably be replaced or 'unloaded' (remove hardware) until they are within range. If you have to unload your PSU, you need a better one, because it just doesn't have what it takes to power your system.

Once you know your PSU is safe, you could run a quick Memtest overnight and report back if it found anything.

http://www.memtest86.com/memtest86-3.3.iso.zip <--unzip and burn image to a CD.

If memtest comes back with an error, remove all but one stick and test again- and keep doing this per memory until you determine which is the bad stick. If they all pass a night of torture, you can probably rest assured it's not the memory.

So if it's not the PSU or the RAM, I would look to blown capacitors on your motherboard (another common problem). They are easily distinguised because they have a halo of chemical residue either bursting from the top of them or blown on the motherboard beneath. They can also bulge (meaning they are about to blow). Capacitors regulate voltage and can essentially cause the same exact instability that a PSU causes. If they are expired, they will cause ****.

Once you test those three, you can start disassembling your computer and rebuilding it from scratch, testing stability after each installed device. You want to test under load. If you install a device and your computer starts acting up, you have a good idea which device it is, and you can replace it. Since your computer is under a year old, each part should be covered by warranty unless you bought refurbished parts. So good news is, this shouldn't cost you any more than a few bucks to fix (pay for shipping, RMAing old part).

Good luck!
__________________
For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth
~Romans 1:16
Kubel is offline  
Old 10-29-2007, 09:40 AM   #8 (permalink)
True Techie
 
Katmandu's Avatar
 
Join Date: Jul 2006
Location: Troy, Ohio
Posts: 224
Exclamation Re: Computer repeatedly reboots

A couple things I would do is this.

#1) Reset the CMOS by pulling out the battery on the MB. Do this to get back to factory settings in case it's an Overclocking issue.

#2) I would clean the CPU/Heatsink connection and put a new coat of Thermal paste on the CPU. It DOES deteriorate over time !!
Katmandu is offline  
Old 10-29-2007, 02:01 PM   #9 (permalink)
Monster Techie
 
Join Date: Apr 2005
Posts: 1,909
Send a message via AIM to jcortes
Default Re: Computer repeatedly reboots

i dont know if you have tried this i didn't read all the posts but i have dealt with this problem in the past most likely a bad driver or something here is a link of how to diagnose the problem and hopefully display an error.

Computer Auto Restart - www.jcortesweb.com
__________________

__________________

AIM = jcortestechhelp
jcortes is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Along came a hub, a switch, and a router....Aren't they the same? ReikokuKo Computer Networking and Internet Hardware 21 01-10-2013 04:13 AM
A switch, and a router....Aren't they the same? ReikokuKo Networking Tips, Tricks & FAQ 10 04-10-2009 06:24 PM
POST Troubleshooting Guide SYL\X/3K Hardware Repairs and Troubleshooting 7 03-07-2009 11:24 AM
Computer reboots randomly guwangeowns Hardware Repairs and Troubleshooting 5 06-15-2007 04:48 PM
Cant seem to fix this dang computer morrty Hardware Repairs and Troubleshooting 7 06-11-2007 11:09 PM



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 02:58 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.