Recent content by BCN_Techs

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    820-00928 No power on - 20V 0.09A

    Good afternoon mates. The board is already manipulated (traces of flux) and there're no traces of liquid: - PPBUS_G3H: 12.53 V - PPBUS_HS_CPU: 12.53 V - PPBUS_HS_GPU: 12.53 V - PP3V3_G3H: 3.0 V - PP5V_S5: 4.99 - PP3V3_S5: 3.3 V - PP3V3_SUS: 0V - PP1V8_SUS: 0V - PPVCC_S0_CPU: 0V - PPVCC_S0_CPU...
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    820-00840 turn on after several minutes

    Hello everybody. The macbook had liquid damage around U7000, it was changed for a donor but, there are problems in power on. When I try to turn it on, it marks me as having no battery and after 15-20 minutes of letting it charge, it turns on with + 50% battery. The failure is random since...
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    820-3476 Green/orange light but no pwr on.

    Finally, I have been able to solve it thanks to 2informaticos. There was no communication between R7151 and R7150: I jumper and it starts, but the fan turns at maximum; I run an ASD and it tells me there's a problem with the fan but nothing else. SMC replacement (had replaced 3 before) and...
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    820-3476 Green/orange light but no pwr on.

    I did what you told me but I couldn't see anything abnormal. Add that when I connect the charger, PM_SLP_S4 / S3 / S0_ L, they give me 3.3V until the fan stops (1-2") and they drop to 0V.
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    820-3476 Green/orange light but no pwr on.

    Good afternoon. I got an 820-3476 that did not turn on: ppbus gave 0.60V. I reballing SMC and it turned on but it had a graphics error: the system detects 15mb on the graphics card and 42 "on the screen. I have tried 3 SMC's from donor boards and none works: it only gets started with smc...
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    820-01598-A not turning on 20V

    Yes sir, both options but give error.
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    820-01598-A not turning on 20V

    Yes sir. I try to update it, the progress bar advances 5-10%, quickly reaches the end and after several minutes, it throws error 4005.
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    820-01598-A not turning on 20V

    Good afternoon, guys. The MacBook had gotten wet, the damaged components have already been replaced (including CD3217), it manages to go up to 20V - 1.30A but it resets to 0A. Reviewing the Power sequencing diagram, the voltages reach the part of H9M LOAD SECURE ROM, SMC BATTERY TRAP: the last...
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    820-00165 not turning on.

    PLT_RESET_L pulses twice and stays 0. Bad CPU? SPI Bus Termination resistors and traces.( will check this but i think it's waste of time)
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    820-00165 not turning on.

    Got this board. All s5 rails are present. No water damage. Just stopped working. ALL_SYS_PWRG is 0V. When i connect magsafe fan doesnt spin but board pulses all s0 rails for a second than stays in s5 state. In SMC bypass fan spin and stop twice and than nothing happens. The only rail not...
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    820-00875-A not turning on shorted PPBUS_G3H

    thanks. will try or revive donor board or swap CPU from it. Will post when done
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    820-00875-A not turning on shorted PPBUS_G3H

    does it have firmware like smc, or just swap?
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    820-00875-A not turning on shorted PPBUS_G3H

    Thanks. Confirmed, it is bad cpu. have u ever changed one? Can i take from donor board with same cpu?
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    820-00875-A not turning on shorted PPBUS_G3H

    L7960 on pin 2 PPVCCIO_S0G is 1.2 ohm. With Q7960 and L7960 removed
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    820-00875-A not turning on shorted PPBUS_G3H

    Definitly i am not decided to fry CPU, this is why i am registered in this forum and asking question to you. Still not injected removed Q7960 and short is gone, after that removed L7960 and short was on second pad ( PPVCCIO_S0G). Dead CPU? Thanks in advance for your help
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