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Optiplex won't P.O.S.T.

Posted on 2008-06-24
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Last Modified: 2013-11-09
Started a couple of weeks ago. MOBO battery going dead. Having to press F1 to continue startup. Yesterday my trusty old SX280 started spontaneously restarting every few minutes. I got a new battery and dropped it in, closed up the case and now. It wont even get to the first part step of posting. No video, no fans spinning up no hard drives spinning up. But the lights come on at least the orange light not the green light comes on. I have not found any info on resetting jumpers and what that might be. Also all components are standard unmodified from the factory one hard drive one video 1.5mg ram.
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Question by:clarkgodfrey
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5 Comments
 
LVL 69

Expert Comment

by:Callandor
ID: 21860358
If it isn't POST'ing, you may have insufficient power (or a bad power supply) or a bad motherboard.  The same symptoms of spontaneous rebooting can occur for either situation.  Try swapping the power supply from another similar machine, and inspect the motherboard for bad capacitors: www.badcaps.net.  Also try the system with just one RAM module, the video card, the cpu and the motherboard.
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LVL 27

Expert Comment

by:David-Howard
ID: 21860722
Make sure your wiring is connected and that nothing is loose. While you're inside, make sure that you CMOS is in correctly. I've had systems that acted in the manner you've mentioned. Some of them (Old ASUS boards), I could get up and running again by reseating the motherboard Molex (power) connector. If nothing is loose and your components and wiring are seated normally you may have a failed power supply or board (as mentioned above).
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Author Comment

by:clarkgodfrey
ID: 21862460
Kinda what I thought. I just thought it ironic as soon I put a new batt on the MOBO. She goes down for the count. I was hoping that with a new batt I had to do some jumper this or that pin after a batt replacment.  Tomarrow I will let you know if I am able to recesitate with the above mentioned suggestions. Thanks
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LVL 93

Assisted Solution

by:nobus
nobus earned 500 total points
ID: 21863083
i suggest testing with the minimum setup - disconnect also all peripherals and network cables :
motherboard + cpu + 1 ram stick, video card, power supply
on boot, do you have a display?
if NO it is one of the connected, swap ram, Power supply, video card - leaving only motherboard and cpu
if Yes, add devices till the problem shows

you can also check the motherboard for bad capacitors as shown here :   www.badcaps.net
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Accepted Solution

by:
clarkgodfrey earned 0 total points
ID: 21871472
Tried all above suggestions. The bad Capacitors were very visable they kind of pop ther tops. Ended up buying a new MOBO on eBay.  I guess I will nurse it along a little longer.
Thanks
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