Announcement

Collapse
No announcement yet.

do Iahve a bad PSU or MB?.

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • do Iahve a bad PSU or MB?.

    yeah I I decided I needed a few case fans.. so Ispliced soem into my normal case fan plug.. and I thought I taped up all the bare ends.. but I missed one set.. and it touched my hard drive... and it still was working oddly.. I beleive it was my +5v line ..

    it melted the red wire of the 3 (red yellow black) .. but now it will still POST, and if I monitor the ahrdware it shows my 12v line at 10.5 or 11v .. and a cd-rom drive will power up on the board.. but no hard drive.. I tried on thatw as not on the system before too..

    I can only imagine that something burned out.. maybe a cap or something.. I'm hoping I could find it and fix it.. anyone have any ideas?
    Shawn



    Check out my web company Minneapolis Web Designer | MODx Web Design - Himmelberger Design


  • #2
    well if the motherboard is still posting then you probably roasted your PSU and hard drive


    I would try it with a diffrent power supply and see if your current drive still works.
    肚子笑痛了
    S60 Install

    Comment


    • #3
      I just checked the hard drive.. and it spins up fine on my home system..

      anyone good with electronics might know what burned out?.. to me it seems like the only issue is the 12v line is a little low..
      Shawn



      Check out my web company Minneapolis Web Designer | MODx Web Design - Himmelberger Design

      Comment


      • #4
        The case of the HD is ground, and the red wire is usually 5v. Take a tester and test to see if the red wire is outputting 5v.

        The 5v line is likely toast. There are likely drive output fets and maybe a fuse on the output that blew. I don't have one, so I can't tell for sure...

        But what is weird is that the Mobo still posts; I wouldn't think it would do that w/o 5v. You really need to test all the lines to see which ones have voltage, and how much.

        KyferEz
        TheCarPCStore.com - Power Controllers (SDC), Inverters, Tank Circuit, GPS, OBDII, CarPCs, and more!
        PSU Wattage Calculator
        Electronics Calculators
        Copper Wire Data

        Comment


        • #5
          ok I'll take a look..

          I have a m1-ATX PSU .. great little guys..
          Shawn



          Check out my web company Minneapolis Web Designer | MODx Web Design - Himmelberger Design

          Comment


          • #6
            ok I looked closer at my PSU.. yup.. roasted and toasted..

            however I used a 6v LED on my 5v line.. and it lit up fine.. and like I said a CD-ROM drive powers up fine on this system..

            Heres the image

            ANyone know a way to work around this.. I don't even know what this does exactly.. the part that burned out.. it's part Q2 on the schematic .. but I can't find anything on what it does exactly.. I also noted.. and you can look in the image.. there are 3 pins on each side that all are coming from the same trace .. I'm wondering if it is just a power cleaner or something.. and can be by passed .. any Electrical Engineers here?.. anyone... buhler?.. buhler?..

            -shawn
            Shawn



            Check out my web company Minneapolis Web Designer | MODx Web Design - Himmelberger Design

            Comment


            • #7
              FDS9435A

              http://www.fairchildsemi.com/pf/FD/FDS9435A.html

              It's a FET. I don't know if it's being used as a simple switch or as the switcher for the DC/DC conversion. It shouldn't be too hard to replace it yourself -- though there may be other damage. Unhook the PSU and manually test it out. What voltages do you get on each of the rails?

              You migh tray talking to Andrewb also. I'm sure he'll be interested to understand the failure mode and might be able to repair it for you.
              2004 4runner

              Comment


              • #8
                thank you very much ...

                from what I can see, it looks like a diode basicly.. that protects against power coming back teh other way ... it looks like there is a gate of soemkind also.. but that is never closed because the pin is left open on this board.. just my .02

                I'll ask Andrewb

                thanks.. anyone else who might have any suggestions I'm up for them!
                Shawn



                Check out my web company Minneapolis Web Designer | MODx Web Design - Himmelberger Design

                Comment


                • #9
                  FIXED!!!!!..

                  all it needed was a new Power Trench thingy.. I pulled one from my busted PW-70A ..

                  thanks for everyone's help.. couldn't have ben done with out everyone!

                  cheers..
                  Shawn



                  Check out my web company Minneapolis Web Designer | MODx Web Design - Himmelberger Design

                  Comment


                  • #10
                    Very good!

                    KyferEz
                    TheCarPCStore.com - Power Controllers (SDC), Inverters, Tank Circuit, GPS, OBDII, CarPCs, and more!
                    PSU Wattage Calculator
                    Electronics Calculators
                    Copper Wire Data

                    Comment


                    • #11
                      i agree, search google for pinouts for your ATX motherboard connectors and make sure each pin is receiving the power it should have.

                      motherboard repair is almost impossible, even if it is a big componant like a capacitor, the solder job is really tuff.

                      Originally posted by KyferEz
                      The case of the HD is ground, and the red wire is usually 5v. Take a tester and test to see if the red wire is outputting 5v.

                      The 5v line is likely toast. There are likely drive output fets and maybe a fuse on the output that blew. I don't have one, so I can't tell for sure...

                      But what is weird is that the Mobo still posts; I wouldn't think it would do that w/o 5v. You really need to test all the lines to see which ones have voltage, and how much.

                      KyferEz
                      Current Progress:
                      [▓▓▓▓▓▓▓---]80%
                      Final Assembly

                      Ramline P3 PC
                      10.4 inch Touchscreen
                      Windows XP Embedded
                      Road Runner
                      http://www.projektnepa.com
                      Electrical Engineer / Mobile DJ

                      Comment


                      • #12
                        Originally posted by csnowman00
                        i agree, search google for pinouts for your ATX motherboard connectors and make sure each pin is receiving the power it should have.

                        motherboard repair is almost impossible, even if it is a big componant like a capacitor, the solder job is really tuff.
                        Duuude.... did you read whe he said he fixed it and it was the PSU.

                        Common now!
                        -Jesus- King of Kings Lord of Lords

                        Comment


                        • #13
                          ooops, sorry i really should read more
                          Current Progress:
                          [▓▓▓▓▓▓▓---]80%
                          Final Assembly

                          Ramline P3 PC
                          10.4 inch Touchscreen
                          Windows XP Embedded
                          Road Runner
                          http://www.projektnepa.com
                          Electrical Engineer / Mobile DJ

                          Comment

                          Working...
                          X