Newly Built Computer Won't Stay On
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Posted by Robert Heiling on December 15, 2006, 11:39 am
Please log in for more thread options Since nobody else has mentioned it, I'll toss this out. Double-check your wiring job in regard to the power-on and reset buttons and motherboard pins. Your magic 4 second delay is exactly the effect you would get if power-off were being held down. Bob | ||||||||||||||||||||||
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Posted by on December 15, 2006, 1:02 pm
Please log in for more thread options Robert Heiling wrote: > Jack Bruss wrote:
> >
> > I just built a new computer, and when I turn it on, it turns off in about 4 > > seconds. I hear a longish beep, and all 4 fans in the system are turning > > before the whole thing shuts down. There is no time for anything to show up > > on the monitor. The system is as follows: > > > > CASE - COOMAS|CAC-T05-UB BLK/BL RT > > PSU - SUNBEAM|SUNNU450-US-BK 450W RT > > MB - ASUS M2N-MX GF6100 AM2 > > CPU - AMD|A64 X2 3800+ AM2 2x512K R > > MEM - 1G|OCZ DII800 OCZ2P800LP1G R > > HD - 120G|WD 7K 8M SATA2 WD1200JS > > > > The Power supply has this temp monitor fan controller thing, and it shows a > > temp of about 25 C, before the computer shuts down. I've tried starting > > with the knob at high, low, and auto, with the same results, that is shut > > down in about 4 seconds. > > > > I tried to boot before I installed the drives, and got the same results. >
wiring
> Since nobody else has mentioned it, I'll toss this out. Double-check your > job in regard to the power-on and reset buttons and motherboard pins. Your
magic
> 4 second delay is exactly the effect you would get if power-off were being held
> down. > > Bob I can't check this until tonight, but do you mean the LED connections? I know on some of them, it was not clear which way they should go on. Jack | ||||||||||||||||||||||
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Posted by Jan Alter on December 15, 2006, 4:44 pm
Please log in for more thread options >
> Robert Heiling wrote: >> Jack Bruss wrote:
>> >
>> > I just built a new computer, and when I turn it on, it turns off in >> > about 4 >> > seconds. I hear a longish beep, and all 4 fans in the system are >> > turning >> > before the whole thing shuts down. There is no time for anything to >> > show up >> > on the monitor. The system is as follows: >> > >> > CASE - COOMAS|CAC-T05-UB BLK/BL RT >> > PSU - SUNBEAM|SUNNU450-US-BK 450W RT >> > MB - ASUS M2N-MX GF6100 AM2 >> > CPU - AMD|A64 X2 3800+ AM2 2x512K R >> > MEM - 1G|OCZ DII800 OCZ2P800LP1G R >> > HD - 120G|WD 7K 8M SATA2 WD1200JS >> > >> > The Power supply has this temp monitor fan controller thing, and it >> > shows a >> > temp of about 25 C, before the computer shuts down. I've tried >> > starting >> > with the knob at high, low, and auto, with the same results, that is >> > shut >> > down in about 4 seconds. >> > >> > I tried to boot before I installed the drives, and got the same >> > results. >>
>> Since nobody else has mentioned it, I'll toss this out. Double-check your >> wiring >> job in regard to the power-on and reset buttons and motherboard pins. >> Your magic >> 4 second delay is exactly the effect you would get if power-off were >> being held >> down. >> >> Bob >
The LED connections wouldn't have any affect on whether the comp stayed on
> I can't check this until tonight, but do you mean the LED connections? > I know on some of them, it was not clear which way they should go on. > > Jack > or not. If the connectors were placed backword the LEDs simply would not light. But if you are skeptical if you've got them right then it certainly would be a good thing to recheck the manual.. I lean towards PS problems myself.. -- Jan Alter bearpuf@verizon.net or jalter@phila.k12.pa.us | ||||||||||||||||||||||
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Posted by kony on December 16, 2006, 6:13 am
Please log in for more thread options On Fri, 15 Dec 2006 21:44:45 GMT, "Jan Alter"
>The LED connections wouldn't have any affect on whether the comp stayed on
>or not. If the connectors were placed backword the LEDs simply would not >light. But if you are skeptical if you've got them right then it certainly >would be a good thing to recheck the manual.. I lean towards PS problems >myself.. It is true, LED connectors being reversed polarity wouldn't in itself cause this, but wrong connector block wiring, particularly to one of the OEM or (more elaborate new cases with several function circuit boards in front) other cases could conceivably route LED or other logical connections where they shouldn't be. Thus, the safest bet is to unplug all such wiring and turn system on by momentarily shorting the two power-on pins together with a metallic object. | ||||||||||||||||||||||
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Posted by on December 16, 2006, 8:14 am
Please log in for more thread options
> It is true, LED connectors being reversed polarity wouldn't
> in itself cause this, but wrong connector block wiring, > particularly to one of the OEM or (more elaborate new cases > with several function circuit boards in front) other cases > could conceivably route LED or other logical connections > where they shouldn't be. Thus, the safest bet is to unplug > all such wiring and turn system on by momentarily shorting > the two power-on pins together with a metallic object. Just tried that - didn't work. One thing seems odd to me. Even though I had the speaker wire off, I still heard the one long beep when I switched on the power. | ||||||||||||||||||||||
> I just built a new computer, and when I turn it on, it turns off in about 4
> seconds. I hear a longish beep, and all 4 fans in the system are turning
> before the whole thing shuts down. There is no time for anything to show up
> on the monitor. The system is as follows:
>
> CASE - COOMAS|CAC-T05-UB BLK/BL RT
> PSU - SUNBEAM|SUNNU450-US-BK 450W RT
> MB - ASUS M2N-MX GF6100 AM2
> CPU - AMD|A64 X2 3800+ AM2 2x512K R
> MEM - 1G|OCZ DII800 OCZ2P800LP1G R
> HD - 120G|WD 7K 8M SATA2 WD1200JS
>
> The Power supply has this temp monitor fan controller thing, and it shows a
> temp of about 25 C, before the computer shuts down. I've tried starting
> with the knob at high, low, and auto, with the same results, that is shut
> down in about 4 seconds.
>
> I tried to boot before I installed the drives, and got the same results.