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  1. A

    820-3115 no memory problem

    One long beep ....
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    820-3115 no memory problem

    Hi this machine not detect memory. I cant see sign of liquid. L3330 shows 1.49V changed U7300 what can i check next step any idea? ( I tried known good memory module, PRAM and SMC reset)
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    820-3462-A randomly power off

    Customer said nothing happen but as you know users newer drops and liquid damage:) Not signs of liquid and case defective.. when i disconnect I/O board problem is continue.
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    820-3462-A randomly power off

    Yes when machine start normally airport is working. ( When i didn't connect I/O board,hard drive,battery also continue same problem)
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    820-3462-A randomly power off

    I also replaced know good items:( didint change.
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    820-3462-A randomly power off

    Hello I have A1425 and power off randomly one day working without any problem then shutdown machine by user 2 hour later cant open when OS loading or login screen power off. Machine not have serial ( user said apple changed board in warranty but i m not sure) ASD gives this error; Any idea...
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    CHGR_UGATE low voltage 820-2850

    When i changed 2 times SMC nothing change:( PPBUS_G3H voltage is low machine cannot turn on and battery is not charging. Any idea for next step?
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    820-3115 missing PP5V_S3

    when i measure U7200 pin 17 ( PP5V_S5_LDO) its show 10K resistance but know good board its endless. then injected 5V this pin U5805 is hot and removed that ic but u7200 also hot. Maybe my u7200 was damaged :(
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    820-3115 missing PP5V_S3

    Hi Board was liquide damaged. After cleaning by ultrasonic cleaner it was worked but one day later it stopped. When i checked voltage cant see PP5V_S3. When i checked u7200 its too hot and replaced it 2 times but nothing changed its also hot. After that i was removed...
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    820-3209 boots but no chime/runs slow

    Im not sure why but after 2013 and later build machine SMC talking with battery if its not meet request or its cant talk create this problem.
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    820-3209 boots but no chime/runs slow

    Did you try SMC reset? Battery is installed on machine ? Do you have ASD for test hardware can you write result?
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    CHGR_UGATE low voltage 820-2850

    Yes Louis when i put jumper U7000 10-11 pins PPBUS_G3H is ok ( first 13V then 11.9V ) machine starts. But i think cant see or charge battery? What is your suggestion? I have to Replace SMC?
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    CHGR_UGATE low voltage 820-2850

    When measure r7021/22/51/52 its shows correct value. removed f7040 nothing changed. But problem interesting 5 seccond PPBUS_G3H is 14Volt and down 2Volt for 5-7 second then again 14V up down up down:)
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    CHGR_UGATE low voltage 820-2850

    CHGR_DCIN is 16.5V CHGR_RST_L is 3.38V CHGR_ACIN is 3.99V
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    [SOLVED] Not turn power on 820-3330-B (pgood missing from U7600)

    Problem solved after when i replaced U7600. Sorry dukefawks you are right board dont have PPCPUVCCIO_S0_REG_R so its cant create PGOOD signals. Thank you.
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    CHGR_UGATE low voltage 820-2850

    Hi everybody I have 820-2850 board, its have PPBUS_G3H 2V. When i checked voltage CHGR_UGATE is 2V so Q7030 cant create PPBUS_G3H. ( When i inject 12.8 V PPBUS_G3H line machine is working ) Replaced 3 times U7000 ,q7030,q7035 ( same time replaced) . I cant find ISL6259AHRTZ datasheet for...
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    [solved]PPBUS_G3H low voltage 820-2850 not charging fixed via Q7055

    Thank you dukefawks ans aprendiz when i changed q7055 its working.
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    [solved]PPBUS_G3H low voltage 820-2850 not charging fixed via Q7055

    I tried known good battery nothing changed:( OS report condition normal for battery.
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    [solved]PPBUS_G3H low voltage 820-2850 not charging fixed via Q7055

    Hi Everybody 820-2850 is working with charger , shows battery and charging but its too slow ( in 40Min. %2 charged). When i checked voltage see PPBUS_G3H is 11.8 volt but must be 12.8V. Louis wrote few times 1or 2 volts is missing on PPBUS_G3H its cause from SMC but i want to ask again any...
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    [SOLVED] Not turn power on 820-3330-B (pgood missing from U7600)

    Thank you for answer dukefawks. I checked again S3 and S0 voltages. I see peoblem at pgood returns. For example P1V8S0_PGOOD is not present but i can measure L7720 1.8V and same thing is P5VS3_PGOOD not present but L7220 shows 5V. When i inject 3.3V at ALL_SYS_PWRGD fan starts to spin ( SMC...
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