Hp Pavilion dv6-3011so GPU reflow failed, help troubleshoot.

Discussion in 'The Projects Forum' started by resven, Aug 4, 2015.

  1. resven

    Thread Starter New Member

    Aug 4, 2015
    2
    0
    Hey,
    I had problems with this laptop..

    - Screen stay black when booting
    - Fans running , HDD spinning and power light works.
    - Caps lock blinking slow but continiously, no error beep from speakers
    - No picture on external monitor

    Checked from Hp support that this code means CPU but i reseated it and swapped to another and same thing happens.
    Previous owner said that it starts working when heated up. ( turn on for few hours or block air channels with tape or someting ).

    That made me think its GPU related, so i thinked about doing reflow, removed mobo and all tapes and connections i could, used heat gun to heat up whole mobo first and then 3 chips ( amd southbridge included ). around 200-250c with infrared thermometer about 30sec per chip.
    Let it cool and tested then this happened:

    -No fans running or hdd spinning
    -When i plug in AC power after few seconds that light turns bluish ( normal ) and stays like that.
    -Power switch light wont turn on or any other light

    I used flux for reflow which should be accepted for eletronics, but i see burn marks where i put it. ( Under chips )Tried cleaning those off with isopropanol but couldnt remove it after reflow.
    Also mobo seems to be bit browner from spots which i heated up.


    Below is picture of gpu chips

    http://tinypic.com/r/1216gsj/8

    Burn marks from flux?

    http://tinypic.com/r/vmugdx/8

    amd southbridge which i reflowed aswell.

    http://tinypic.com/r/2u7937s/8



    Is it completely toasted and nothing can be done?
    thx
     
  2. resven

    Thread Starter New Member

    Aug 4, 2015
    2
    0
    board is gone now.. this can be removed.. dunno how.. admin?
    thx
     
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