compaq sr5214x

Dell / OPTIPLEX 755
August 31, 2011 at 00:59:47
Specs: Windows Vista, 2.66 GHz / 3036 MB
I have a compaq sr5214x and I powered it up and nothing the computer turns on but the power lights does not come on, now I hear the fans turn on and I can open my cd drive and hear the hard drive come on but nothing I get no video so I stuck on a video card and still nothing. I have changed out the ram from pc2-5300 to pc2-3200 and still nothing so is this motherboard shot or what or could it be that my cpu is fired. When I first got this computer there was a lot of dust by the heat sink and I have cleaned it and put paste on the cpu and put the heat sink back and I still didn't get anything. This computer has a Intel Pentium dual core at 1.6 GHz and one pc2-5300 512mb ram. So can someone try to tell me how to fix this thing?

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August 31, 2011 at 21:01:57
If this is a PC you just picked up and don't know its history, make sure everything is connected correctly internally.

Then check my # 2 here:

But it's probably the PSU and maybe the motherboard. Often when a PSU fails it ruins the motherboard as well.

Here's another site that goes into a lot of detail:

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August 31, 2011 at 21:16:24
I am no technician by any means but I have noticed a trend over the past few years of failing power supplies. I assume this is due to manufacturers such as Dell, HP, etc..etc.. are using cheaper parts to keep costs down. Just my opinion. Personally I have had three myself in two years all Dells. They were not only, again just my opinion, cheaply made but also did not seem to have enough wattage for the computer they were in. If they did it was border line at best. I have only seen one fail completely where nothing at all worked. All others I have seen I call partial fails where there is still power to a few things like lights or disc drives but not the entire system. Sadly as DAVEINCAPS has pointed out this does sometimes damage the motherboard.

Just out of curiosity how much paste did you put on the heat sink?

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August 31, 2011 at 22:36:08
That's kinda hard to say about the pastes because I cant get you right detail. But enough to spread across the processor and a tide more but I only ran this computer 30 secs at a time. This computer was not doing anything before I pulled the heat sink and I stuck on another power supply and still nothing I also resetting the bios thinking that some idiot didn't update the bios right and I have gotten nothing. And I got this computer from a buddy of mine and paid 10 bucks.

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September 1, 2011 at 06:56:23
You don't need much paste. A dab about the size of a grain of rice but I doubt at this point paste ooze is the cause of your problem.

Do you hear any beeps during attempted boot? Try removing all the ram and boot. Also if there is paste being squeezed out from under the heat sink that needs to be cleaned up and done right.

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September 1, 2011 at 13:31:28
With ram or no ram no beeps

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