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
    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


    Burn marks from flux?


    amd southbridge which i reflowed aswell.


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

    Thread Starter New Member

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