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Dell Optiplex 745 hangs on dual core

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    #1

    Dell Optiplex 745 hangs on dual core

    Hi guys!
    Im new to the caps world. I used to had issues in the old p4 times.
    I replaced an old p3 with a "new" optiplex (looking for a cheap media center and multipurpose linux machine).
    I cant install XP or any windows on it (hangs or bsod), so Im using Centos.
    The problem it hungs after 10 minutes if Im using both cores (core2duo). When I disable one, it works 80% uptime! When it crashes randomly. Specially when Im doing long checks (md5 for example)
    I was wondering if it is the CPU, the motherboard, or maybe the caps. When check time ago the were apparently ok, there werent any popup (as far as I know).
    What would be the problem?

    Thanks guys!
    Tags: None
    #2
    Re: Dell Optiplex 745 hangs on dual core

    Sounds like a problem of bad caps in the VRM of the motherboard, check them.

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      #3
      Re: Dell Optiplex 745 hangs on dual core

      Ok, what should I've looking for? Do you have a guide perhaps?
      I was looking some over the internet and found several ones, but I dont know if all of them apply.
      Thanks again!

      Comment

        #4
        Re: Dell Optiplex 745 hangs on dual core

        which version of the GX745 is it? All versions were prone to bad caps....but different versions use different caps.
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          #5
          Re: Dell Optiplex 745 hangs on dual core

          hmmm version? Its the mini tower, or do you refer to a code?

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            #6
            Re: Dell Optiplex 745 hangs on dual core

            Originally posted by Giskard View Post
            hmmm version? Its the mini tower, or do you refer to a code?
            That would be the SFF. the USFF would have an external power supply.

            Here's the kit:
            https://www.badcaps.net/store/produc...roducts_id=127
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              #7
              Re: Dell Optiplex 745 hangs on dual core

              Ok great! its good to know it must be the caps. Ill check them tonight and send a photo of it.

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                #8
                Re: Dell Optiplex 745 hangs on dual core

                Hi Giskard, have you tested our PC's Ram?, I have had major trouble with O\S install on a similar model Dell (Optiplex 755) Customer was reporting frequent rebooting, freezing & bluescreening, the bluescreening offered no info as to why the problem was occurring (not unusual for bluescreens, lol) he suspected the issue was related to a new video adapter he fitted and claimed the problem started happening after updating the drivers for said Adapter. He requested a data backup & a fresh install of Windows 7, data backup went fine but i ran into major issues with the install with the system hanging and also reporting files could not be found on the dvd, using new DVD's didnt have any effect. I decided to run Memtest86+ (http://www.memtest.org/) and within seconds of the scan starting it started reporting errors in one of the memory modules, replacement of the faulty module sorted the issue 100% and PC has been working like a dream since, i suspect the customer may have caused static damage to the ram when fitting the Video Adapter?, just a suggestion before you start poking around at the Motherboard.

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