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Thanks to your advice while checking u7700 VLDO I found a short in pp5v_BSTLQ_VOUT_MPMU and when solving this the machine is alive!!

Hello guys this is a 820-02016 in 5.13v 0.04amps on both usb ports No power on from battery No enter on DFU MODE ppbus_AON = 12.25v pp3v8_AON_VDDMAIN =3.75V PP5V2_S2= 0V PP3V3_S2=0V PP1V25_S2=0V Diode mode PP5V2_S2= 0.209v PP3V3_S2=0.447v PP1V25_S2=0.228v How can start

Ok , this is for parts ;(

Hi 2nformaticos! Thanks for your response PPVRTC_G3H is in short Remove u1900/c1910/c0892/c0891/c0890 and still have the short Diode mode read 0.008v Something to do?

Is a 20 MHz oscilloscope useful for macbook repair?

hi everyone, sorry about my english This is a 820-00165 that not turn on. The magsafe led is orange ppbus_g3h 8.56v pp3v42_g3h 3.39v (i think is low and change u7090, r7095/r7096 and istill have same read) pp5v_s5 5v pp3v3_s5 3.3v pp5vs4s3. 0v PM_SLP_S4_ 0v pp3v3_SUS 0v PM_SLP_SUS_L 0v

I suspect that the smc could cause the trouble because it was reflowed previusly. Need a donor for this SMC. Soon update with the result. Thanks for the help

No SMC_DELAYED_PWRGD 0v

Thanks for the reply The pad on u1950 are good and just in case change the chip and still the same

Hi Mac Tech ALL_SYS_PWRGOD 3.3v

Hi guys, sorry about my English. This is an 820-3476A that arrived without power on. The SMC looks reflowed and liquid damage around u7200. I change u7200 and now the board turn on but not fan spin, no chime, and no usb activity. I try a good efi bios and still no brain PPVCC_S0_CPU...

Good morning Yes is turning on in SMC bypass mode! No green light still All the reads are onli whit the charger. U7000 Resistance pins 17/18 5 ohm Resistance pins 27/28 25ohm 1 0.003v 2. 16.62v 3. 4v 9. 0.033v 12. 3.4v 13. 3.4v 14. 0.8v 15...

Thanks for the welcome i´m happy to be here the board dont turn on from the charger, i´ts 85w original R5087 -450k , all the board is clean , no sign off water damage

hello guys, this is my first post!! sorry my english 820-3115 No green Light ,but turn on with battery PPBUS_G3H 12.57v SMC_BC_ACOK oscillates 0.6-0.8v CHGR_ACIN 3.9v CHGR_DCIN 16.75v SMC_RESET_L 3,3v CHGR_RST_L 3.4v In cap c7050 5ohm In cap c7020 25ohm I try new u7000 and still nothing...