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    REFLOW Clevo logic board with ATI radeon 4570

    Discussion in 'Sager and Clevo' started by zoscarz, Apr 3, 2012.

  1. zoscarz

    zoscarz Notebook Enthusiast

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    Hi!!

    Anyone knows the correct temps for melt the ATI GPU 4570 to de logic board
    of a Clevo M77cu?

    I need try it because i received black screen, included external VGA db15 and 1 long beep then 2 short beeps in my Clevo M77cu.

    The OS continue loading if i press F1 key to resume the stop by this event, but the sreen remains black.

    Anyone experience with ATI refow?
    I can see lots of Nvidia reflows, but hard to find info about ATI GPUs

    THANKS
     
    zoscarz, Apr 3, 2012
    #1
  2. Support.3@XOTIC PC

    Support.3@XOTIC PC Company Representative

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    I dont think its card specific as it's based on the temp that solder melts which around 364F but that does vary depending on the type of solder used.
     
    Support.3@XOTIC PC, Apr 3, 2012
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  3. hizzaah

    hizzaah Notebook Virtuoso

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    Most of the baking guides I've read say 385F.. Good luck!
     
    hizzaah, Apr 3, 2012
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  4. zoscarz

    zoscarz Notebook Enthusiast

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    With Nvidia chips i read u have more temp error tolerance, and with ATI ther´re
    some capacitors that if u dont dischargue before reball or reflow if contact other
    pad dischargues the 5v dc that is the death of 3,3v chips. Thats why needs exact temps
    for preheat.


    I read that leadfree soldering is 219Celsius, and death GPU aprox 105Celsius.

    THANKS FOR YOUR ATTENTION
     
    zoscarz, Apr 3, 2012
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  5. hizzaah

    hizzaah Notebook Virtuoso

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    The gpu 'death temp' you're talking about is more or less it's max operating temp. Not what you're worried about.. 219C is ~426F. That seems way too hot. You don't want your solder to all melt off, just heat up enough to move into the cracks..

    You need to be in the ~190C range..

    Edit: http://hardforum.com/showthread.php?t=1421792 thread from another forum where he baked a mobo to fix an integrated gpu..
     
    hizzaah, Apr 3, 2012
    #5