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[SOLVED]820-2879 strange power on

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  • dukefawks
    replied
    check sense circuits

    Leave a comment:


  • Bohmmen
    replied
    PPBUS_G3H is stable with battery but it still won't turn on

    Leave a comment:


  • dukefawks
    replied
    Does it work from a charged battery? Probably more corrosion on sense circuits.

    Leave a comment:


  • Bohmmen
    replied
    New problem.
    Everything worked perfect except the dvd-drive. turned it off and mounted another drive. now it wont start.

    PPBUS_G3H is dropping from 12.6 to about 3.3 v and then back to 12.6.
    no PP3V3_S5
    Bad ISL6259?
    Last edited by Bohmmen; 10-09-2016, 01:17 PM.

    Leave a comment:


  • Bohmmen
    replied
    replaced R7050 and ran a jumper from R7051 and now the error error in ASD is gone and everything seems to work.

    Thanks alot for your help

    Leave a comment:


  • Bohmmen
    replied
    no contact from R7051 to R7050

    Leave a comment:


  • Bohmmen
    replied
    yes
    R7050 looks a bit strange. the solder is dark grey

    Leave a comment:


  • dukefawks
    replied
    Check sense resistors and traces again, this is a current sense issue in R7050/51/52 circuit. Corroded trace or resistor, measure resistance between pins 17 and 18.

    Leave a comment:


  • Bohmmen
    replied
    Ok

    Current (IPOR) --Battery-BMON Eng (test 1) - Sensor Reads Within Operating Range
    - Check to ensure that sensor reads within operating range.
    ERROR - Sensor is reading above the high limit.
    - TEST FAILED -

    Leave a comment:


  • dukefawks
    replied
    Try and run ASD to check for errors

    Leave a comment:


  • Bohmmen
    replied
    PPBUS_G3H is 12.63v
    PP3V42_G3H is 3.42v
    PP3V3_S5 is 3.3v

    they are all stable and doesn't change.
    Battery is charging.

    Board Looks nice

    Leave a comment:


  • dukefawks
    replied
    What is PPBUS voltage? Does it charge?

    Leave a comment:


  • Bohmmen
    replied
    R7051, R7052, R7021 and R7022 is all good

    Leave a comment:


  • dukefawks
    replied
    Check sense resistors to ISL6259

    Leave a comment:


  • Bohmmen
    started a topic [SOLVED]820-2879 strange power on

    [SOLVED]820-2879 strange power on

    Hi.

    Got this board yesterday.
    When I press powerbutton the fan spins for 5 sec then it dies.
    For some strange reason I decided to keep holding down the powerbutton longer and after 10 sec I heard noice from the dvd drive and after that a normal DONG.
    It booted normal and everything seems to work.

    I have tried another keyboard with same results.

    What is causing this problem?

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