how to reflow laptop graphic chip

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  • saqi80
    saqi
    • Oct 2010
    • 6
    #1

    how to reflow laptop graphic chip

    Hi Everyone,
    i am new to this forum, will try my best not to bother u ppl.
    Basically i want to know how to reflow graphic chip of laptop, i have got hot air, can anyone tell me what temprature shud be, how long shud i keep it on graphic chip, what shud be distance b/w chip and hot air and other necessarily things?
    sorry for bad english
    thanks
    Tags: None
    • shovenose
      Send Doge Memes
      • Aug 2010
      • 6575
      • USA
      #2
      Re: how to reflow laptop graphic chip

      you could just put it in the oven for like 10mins.
      heat guns are good at frying other components.

        Comment

        • PCBONEZ
          Grumpy Old Fart
          • Aug 2005
          • 10661
          • USA
          #3
          Re: how to reflow laptop graphic chip

          Ovens are better than heat guns for frying other components because they heat EVERYTHING.
          Mann-Made Global Warming.
          - We should be more concerned about the Intellectual Climate.
          -
          Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
          - Dr Seuss
          -
          You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
          -

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 30944
              • Albion
              #4
              Re: how to reflow laptop graphic chip

              he's not got a heat gun because he's asking about the temperature.
              i think he probably has an smt air station.

              it needs flux injected/sprayed under the chip before you heat it btw.

                Comment

                • saqi80
                  saqi
                  • Oct 2010
                  • 6
                  #5
                  Re: how to reflow laptop graphic chip

                  yeh u right i got air station but want to know how long(duration) shud i heat it for and what temprature shud be? shud i heat it under the chip or oven the chip?
                  dont want to try oven anymore as i had bad experience doing with oven, it made motherboard stop working in the past so bit freaky.
                  Thanks for your response

                    Comment

                    • lasttarget
                      Member
                      • Jul 2010
                      • 10
                      #6
                      Re: how to reflow laptop graphic chip

                      Heat gun is not the way to go. If you want to do it right you have to reball. There is no other way than to reball for a permanent fix. The problem is that the solder balls used are lead free and although they have a higher melting point then lead solder, they are more susceptible to cracking under heat strain. You must reball with lead solder balls. A heat gun will probably popcorn the chip and you will have a graphics error again in the near future.

                      Doing it professionally cost a lot for the equipment alone.
                      You will need:
                      stencils
                      IR station
                      Hot air gun
                      Liquid flux
                      paste flux
                      thermal couple(s)
                      aluminum foil tape
                      kapton tape
                      soldering iron
                      wick
                      suction pen

                      On top of that you will need a lot of experience and knowledge

                      Do not use your hot air gun on the chip unless you just want to use it a bit longer till it dies. If you do, a real repairman like myself wont even be able to salvage the chip.
                      Last edited by lasttarget; 11-04-2010, 12:01 PM.

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