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Power Supply or Motherboard??

By mantia1126 ·
OK, here's what's happening:
The computer's an Emachines T2682 w/ an Intel Celeron 2.60Ghz CPU, and what's happening is when it boots up, nothing happens but a low grumbling sound from the int. mobo speaker, no fans, no nothing; checked the power supply both at the mobo board conn. and at the hard drive conn., and both seem fine, running correct levels of current. Checked CPU/heatsink fan, no evidence of CPU being fried; tried diff. CMOS battery, nada as well. BUT----when I unplugged the 2nd(4-pin) 12V auxiliary power conn., both the P.S. & CPU fans came to to life, so something's overloading the power supply, or there's a prob w/ power supply itself. How can I tell if the load problem lies with the PS or with the mobo?? What's the aux. 12V power conn. go to??

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by BFilmFan In reply to Power Supply or Motherboa ...

Remove all the cards installed in the slots to troubleshoot the issue is my first suggestion.

And you would need a technical support manual from EMachines to see the schematics for what is being powered by the Aux 12V power connector.

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by mantia1126 In reply to Power Supply or Motherboa ...

yeah, I have the Emachines motherboard (a Trigem IM845GL Imperial v1.01) manual, but it doesn't provide me with the information on what the 12V auxiliary power connector actually goes to, only that it's a 12V auxiliary power supply, period. The board 'schematic' that the manual provides isn't actually a schematic, but more of a component identification diagram and nothing more. And the only card that's installed in the PCI slots is a 56k modem; same thing happens regardless of whether it's plugged in or not, and the same goes for the HD, CD-RW, and FDD...

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by mantia1126 In reply to Power Supply or Motherboa ...

yeah, I have the Emachines motherboard (a Trigem IM845GL Imperial v1.01) manual, but it doesn't provide me with the information on what the 12V auxiliary power connector actually goes to, only that it's a 12V auxiliary power supply, period. The board 'schematic' that the manual provides isn't actually a schematic, but more of a component identification diagram and nothing more. And the only card that's installed in the PCI slots is a 56k modem; same thing happens regardless of whether it's plugged in or not, and the same goes for the HD, CD-RW, and FDD...

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by 3xp3rt In reply to Power Supply or Motherboa ...

It can be both of. But what you describe it?s most probably the power supplies. You can try to put in one other power supplies, but attention to max. power capacity.

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by HAL 9000 Moderator In reply to Power Supply or Motherboa ...

It could be either but I would tend to look at the Power Supply first as they particularly the ones supplied by E Machines are not known for great quality.

I would look at an Antec or something similar if you have a standard size PS and provided you get the right type as they now have both 20 & 24 pin ATX connectors you can not go too high in power ratings but something around the 450W + would be a good idea.

If the computer Boots Up normally without the 4 Pin connector connected I would tend to be looking at the PS rather than anything else but just to be on the safe side you could always try The Ultimate Boot CD to check out any possible Hardware problems.

http://www.ultimatebootcd.com/download.html

Col

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by mjd420nova In reply to Power Supply or Motherboa ...

First, isolate the hard drive, CD drives from the
power supply if it starts, one of the drives is
at fault. If the power supply still won't start,
then carefully un mount the plug in cards and
remove the memory too. if it doesn't start, the
MOBO is bad. Check the pins and track them each,
pay close attention to any capacitors that may
be bulging, leaking or look funny. Doule check
the standoffs for the system board, they can
short out underneath, the fiber washers may have
slipped out of place.

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by ctrservices In reply to Power Supply or Motherboa ...

One other thing to consider which seems to happen with Emachines. Their memory chip(s)can test out good and still cause weird things to happen (I had one with two chips which both tested good, but one was responsible for eratic symptoms).

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by mantia1126 In reply to Power Supply or Motherboa ...

I have a replacement power supply that should be here on Monday, at which point I'll award the points one way or the other....

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i have the same problem this morning

by smolkaco In reply to

my E starts to boot up and then shuts down, power supply right?

john

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by mantia1126 In reply to Power Supply or Motherboa ...

OK guys, I just replaced the power supply with a brand new one, and still no go...I take it then that it's probably gonna be either the CPU or the mobo then?

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