Pc shuts down after few seconds of starting

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  • Lowmemory
    PCHF Member
    • May 2021
    • 15

    #1

    Pc shuts down after few seconds of starting

    When pc powers on, all fans and led lights are running as normal then shuts off after a few seconds then it powers on by itself and shuts off again. It keeps doing this until i turn the power supply off. This happens after i applied new thermal paste on the cpu.
  • Bruce
    PCHF Moderator
    • Oct 2017
    • 10702

    #2
    any chance the power button is stuck in?
    laptop or desktop?

    you put all the cables back the way they were?
    no lose connectors?
    no thermal paste dripping out from the heatsink?

    Comment

    • Lowmemory
      PCHF Member
      • May 2021
      • 15

      #3
      Originally posted by Bruce
      any chance the power button is stuck in?
      laptop or desktop?

      you put all the cables back the way they were?
      no lose connectors?
      no thermal paste dripping out from the heatsink?
      Power button looks good, not stuck. I checked everything and all the wires are connected where they should. I also tested it with a working power supply and it still happening so its not the power supply. Does adding too much thermal paste a bad thing? I applied a good pea size amount, not too much and not too little. i used alcohol wipe to cleaned the dusts and also use the wipes to get rid of the old paste.

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      • Lowmemory
        PCHF Member
        • May 2021
        • 15

        #4
        This is a desktop

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        • Lowmemory
          PCHF Member
          • May 2021
          • 15

          #5
          The paste covered just enough of the cpu surface, not dripping outside. Maybe i fried my motherboard?

          Comment

          • Bruce
            PCHF Moderator
            • Oct 2017
            • 10702

            #6
            if there is no paste oozing out the side, then you used the right amount.
            and it was all working fine before the paste was renewed?

            in the off chance it is the power button on the case, remove the cable for the PWR SW from the front panel header on the motherboard. once removed, those two pins can be shorted out with a screwdriver (or whatever) to get the PC started.
            if it still switches off, it ain’t the power button.
            and i would pull it all apart, and reassemble on a flat surface somewhere for further testing.

            Comment

            • Lowmemory
              PCHF Member
              • May 2021
              • 15

              #7
              I can finally see the displays on the screen and got to the windows log in after i removed 2 of the rams out and just having two in (4 total rams) Not sure why it works but if you know why, let me know, thanks.

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              • Bruce
                PCHF Moderator
                • Oct 2017
                • 10702

                #8
                either faulty RAM or more likely they need a clean, both the motherboard slot they go in and their actual circuitry. use a soft bristled brush and wipe both of those areas, reseat the RAM and see how it goes.

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                • Lowmemory
                  PCHF Member
                  • May 2021
                  • 15

                  #9
                  Ok so i cleaned the ram slots with a toothbrush, pc having no issue
                  Originally posted by Bruce
                  either faulty RAM or more likely they need a clean, both the motherboard slot they go in and their actual circuitry. use a soft bristled brush and wipe both of those areas, reseat the RAM and see how it goe
                  Originally posted by Bruce
                  either faulty RAM or more likely they need a clean, both the motherboard slot they go in and their actual circuitry. use a soft bristled brush and wipe both of those areas, reseat the RAM and see how it goes.
                  I cleaned them slots and when i put 4 rams in those 4 slots, i get a boot loop. If i removed the ram from the first slot, it works . Turned pc off and put the ram from the second slot into the first slot, it works also (rams are in slot 1, 3 and 4) if i put the ram from either slot 3 or 4 into slot 2 while one of the slor is empty, it works (rams in slot 1, 2, 3 or 1, 2, 4) i think it only does the boot loop if i put all 4 in all 4 slots. Not sure whats causing this.

                  Comment

                  • Bruce
                    PCHF Moderator
                    • Oct 2017
                    • 10702

                    #10
                    each memory slot has a controller chip.
                    so you are either looking at a dead slot or a dead memory chip.

                    Comment

                    • Lowmemory
                      PCHF Member
                      • May 2021
                      • 15

                      #11
                      Originally posted by Bruce
                      each memory slot has a controller chip.
                      so you are either looking at a dead slot or a dead memory chip.
                      Will try to test with new ones and see if that solves the problem

                      Comment

                      • Lowmemory
                        PCHF Member
                        • May 2021
                        • 15

                        #12
                        Now my pc is reading each of my 8gb ram as 2gb and i already tried most of the methods. Jumping jbat1, took battery out, unplugged and turned off power supply and connectors that connects to the power supply. Waited 10 minutes, plugged connectors in, puy battery in, starts pc and still reading as 2gb each.

                        Comment

                        • Lowmemory
                          PCHF Member
                          • May 2021
                          • 15

                          #13
                          Also tried
                          Originally posted by Lowmemory
                          Now my pc is reading each of my 8gb ram as 2gb and i already tried most of the methods. Jumping jbat1, took battery out, unplugged and turned off power supply and connectors that connects to the power supply. Waited 10 minutes, plugged connectors in, puy battery in, starts pc and still reading as 2gb each.
                          Also tried going into msconfig, under boot, advance setting. Unchecked max memory and applied, save and restart. Same result.

                          Comment

                          • Bruce
                            PCHF Moderator
                            • Oct 2017
                            • 10702

                            #14
                            so you have 4 x 2GB sticks and they are all working now?

                            Comment

                            • Lowmemory
                              PCHF Member
                              • May 2021
                              • 15

                              #15
                              Originally posted by Bruce
                              so you have 4 x 2GB sticks and they are all working now?
                              I have 4x 8gb sticks and pc reading them as 2gb each.

                              Comment

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