Toshiba C660 LA-7202P water damage

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  • spleenharvester
    Badcaps Veteran
    • Mar 2010
    • 882
    • UK
    #1

    Toshiba C660 LA-7202P water damage

    Got this board today. Not a heavy amount of water damage and no corrosion but the damage ended up where it mattered.

    It's covered TPS51125, the card reader chip, and the ISL chip which generates GFX/CPU vcore. All right next to the SATA connector.

    Done a good clean up and done resistance tests. Surprisingly, almost all lines test OK with only +5VALW, +3VALW shorted. So I think I stand a chance of getting this board working (it's a very rare Socket G2 board for this model so I'd like to!

    Lots of blackened caps around the TPS51125. Far as I can tell no voltage is generated past VIN.

    Schematic here:

    How do I test TPS51125 and the ISL charger chip?

    Cheers!
    Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD
    Tags: None
    • spleenharvester
      Badcaps Veteran
      • Mar 2010
      • 882
      • UK
      #2
      Re: Toshiba C660 LA-7202P water damage

      PQ332 tests as shorted from pins 1/2/3 to pin 4. So either PQ332 is shorted or TPS51125 is. I'm guessing I need to replace TPS51125?

      B+ line is okay, full 19V on that side.
      Last edited by spleenharvester; 11-01-2013, 07:10 AM.
      Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

        Comment

        • spleenharvester
          Badcaps Veteran
          • Mar 2010
          • 882
          • UK
          #3
          Re: Toshiba C660 LA-7202P water damage

          Can I replace TPS51125A with TPS51125? I've found a VIN-side dead L450 board with exactly the same TPS51125 schematic, except it doesn't use the A version!

          I'm guessing I need to remove 51125, test for the shorted caps, replace any, then replace 51125?
          Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

            Comment

            • spleenharvester
              Badcaps Veteran
              • Mar 2010
              • 882
              • UK
              #4
              Re: Toshiba C660 LA-7202P water damage

              Replaced TPS51125, plugged in, heard a brief "BZZZ" sound. Still dead but now there's the sound of a relay clicking. And 5V rail is no longer shorted.

              EDIT: Something on VIN is now shorted. I think this one is dead.

              EDIT2: Plugged battery in and something on the board went up in plumes of smoke. Lol this one is screwed. TPS51125 isn't even anywhere near VIN so I have no idea what's caused this.

              EDIT: I know what I did. soldered TPS51125 the wrong damn way! FFS! Make sure you get your positioning right when you solder folks!
              Last edited by spleenharvester; 11-01-2013, 09:08 AM.
              Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

                Comment

                • tomodachi
                  Badcaps Veteran
                  • Apr 2012
                  • 593
                  • Turkey
                  #5
                  Re: Toshiba C660 LA-7202P water damage

                  Originally posted by spleenharvester
                  Replaced TPS51125, plugged in, heard a brief "BZZZ" sound. Still dead but now there's the sound of a relay clicking. And 5V rail is no longer shorted.

                  EDIT: Something on VIN is now shorted. I think this one is dead.

                  EDIT2: Plugged battery in and something on the board went up in plumes of smoke. Lol this one is screwed. TPS51125 isn't even anywhere near VIN so I have no idea what's caused this.

                  EDIT: I know what I did. soldered TPS51125 the wrong damn way! FFS! Make sure you get your positioning right when you solder folks!
                  I really wonder if you managed to work it or not

                    Comment

                    • spleenharvester
                      Badcaps Veteran
                      • Mar 2010
                      • 882
                      • UK
                      #6
                      Re: Toshiba C660 LA-7202P water damage

                      Agh I had a good chance too! Turned out when I checked the orientation I was looking at TPS51125 on a different schematic :/ Ah well, we live and learn.
                      Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

                        Comment

                        • tomodachi
                          Badcaps Veteran
                          • Apr 2012
                          • 593
                          • Turkey
                          #7
                          Re: Toshiba C660 LA-7202P water damage

                          Originally posted by spleenharvester
                          Agh I had a good chance too! Turned out when I checked the orientation I was looking at TPS51125 on a different schematic :/ Ah well, we live and learn.

                            Comment

                            • ChetanSethi
                              Member
                              • Oct 2015
                              • 11
                              • India
                              #8
                              Re: Toshiba C660 LA-7202P water damage

                              i have la-7202p toshiba logo stuck both bios are reprogram but same any solution

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