power turning on and off after a few minutes

Gateway 505gr desktop
October 6, 2009 at 16:27:16
Specs: Windows XP home edition, 2.6 mgz celeron, 512MB Ram
T1842 E-Machine with a 2.6 MGz Celeron
I have the motherboard out and see that it's a Imperial GL_VE_20020930......It looks to me like it has plenty of heat grease between the processor and the heat sink..........When i turned it on without the side cover on it, i heard it making a sort or clicking sound,So i looked at the lights on the front panel and then i could tell that the computer was turning off and back on about once every second or two. so i laid it on it's side to take a closer look at it, then when i tried to turn it off the button switch on the front wouldn't shut it off, the only way i could shut it off was by turning the switch off on the power supply. I had another fan so i plugged that one in where the fan for the CPU plugs in, but that fan did the same thing, so then i thought it was something in the M-board acting up. I took the power supply off and tried in on another computer and that computer didn't act right when i tried to start it so i took it off and put the original one back on the computer that i tried it on and it started fine.
So that makes me wonder if i have a bad power supply in the E-Machine. Do you think that a power supply could be causing all my problems? or do you think there is more to it?
When i was messing around with it, suddenly i saw smoke coming out of somewhere but as soon as that happened i pulled the plug and never got to see exactly where it was coming from.
I took the M-board out and looked it over real good with a magnifying glass and don't see anywhere on it that looks burnt.
The only thing that has a burnt smell to me is the fan that goes on the heat sink. The only other fan that is in it besides the one on the M-board heat sink is the one thats in the power supply, do you think when i get it back together that i should add another fan?
What i'd like to know is if the power supply is bad, could it have caused all the problems?
Can anyone out there help me figure out my problem, do you's have any sugestions?
I have the board and the power supply out of it now!
Hope someone can help and thanks for your time and expertise..........Tom

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#1
October 6, 2009 at 16:30:01
For some reason it wouldn't let me get rid of the gateway 505gr, were talking about a E-Machine T-1842.....thanks again.............Tom

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#2
October 6, 2009 at 17:06:36
"It looks to me like it has plenty of heat grease between the processor and the heat sink"

Plenty? The amount of paste that goes between the CPU & heatsink should be a dab no larger than a grain of rice. If you used "plenty", the paste acts like an insulator & prevents the heat from transfering from the CPU to heatsink...the CPU then overheats & forces a shutdown.

"I had another fan so i plugged that one in where the fan for the CPU plugs in"

So you let the CPU run without a cooling fan? Not a smart move.

"Do you think that a power supply could be causing all my problems?"

eMachines are known for using crappy Bestec power supplies that have a high failure rate, so I'd say that's most likely the cause of your problems.

"do you think when i get it back together that i should add another fan?"

No.

"I have the board and the power supply out of it now!"

There was absolutely no reason to remove the board. Your troubleshooting skills need work.


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#3
October 6, 2009 at 18:47:16
By plenty i mean't that there was enough to do the job & not to much paste between the CPU & heatsink.

The only reason i plugged the other fan in was because i thought the fan might have been the problem.

Yeah i let run a minute or two without the fan, so what ! I found out it wasn't the fan because the otherone did the same thing.

The power supply isn't a Bestec, it's a CodeGen 350W I don't know if thats any better or not !

Why shouldn't I put another fan in?

It's pretty hard to check the board when it's installed and only takes a few minutes to take it out. So I took it out, big deal !

You don't seem to me like your to smart yourself, you never did say why you thought the fan fried. That was one of my questions.

Maybe someone thats more intelligent than you will have some better input for me, because as far as i'm concerned you didn't tell me anything that I didn't already know, except that they used cheap power supplies that seem to be one of their problems.

Tom


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#4
October 6, 2009 at 22:17:09
I put everything back into my e-machine tower after a little tweek here and there and have it running smooth once more. Just thought i'd let you know that i don't need the help on it anymore, thanks...........Tom

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