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Already check signals and seems ok! CMOS remains at 3V. I I already did a reflow on SMC, jump a wire directly J5120 (SMC_ON_OFF) to J6901 (PWR_BTN_R) and same history the machine don't turn on when button is pressed! I've been fixing some old imacs with the similar problem replacing...

Hey guys, Working on imac 21.5 - 820 3588. this one came with the problem not turning one. I open it, removed the board and i noticed that cmos 3V was only with 1.5V. I replace the pile for a new one and i thought the problem was solved but after 2 days the problem remains! I already...

You are right one more time mr.Vali! U7200 problem. replace u7200 and the machine turn's one but with DC power suply only consume 0.100A! i have 0v and 3.3ohm on 3 coils L7330, L7320 and L7310! already soldered the 3 FDMF6708N again but only consume 0.100A. CPU fail ? any time anyone have...

Hey, the components just arrived and already replace all FDMF6808N for a new ones FDMF6708N and no lucky!! PPBUS shorted in the same! If i remove U7330 short goes away!! and if i measure resistance on L7330 i have 0 ohm! already soldered a wire on L7330 with 1.1V and consume 2A. Still hoped...

Hey, This one don't turn on because to the typical CPU vcore drop-out issue! PPBUS down = 0,700V and when i plug the charger in the area of U7330 get's hot! my questions, i must replace All FDMF6808N ?? CAn i replace for a new on FDMF6808N ?? or i must replace for FDMF6708 ? thanks

Very thanks Mr.Vali for information! learning from the best doesn't take up space! many thanks

Thanks a lot Mr.Vali! i means N channel mosfet! i think only transistor can be designated PNP - (N channel mosfet) and NPN - (P channel mosfet). I think that's what I learned at school a long time ago! many thanks

Hey, working on IMAC 27 - 820 3478 and this one didn't turn on! I found Q7650 shorted on REG_PHASE_P5VS4. Q7650 = FDMC0223S - I can't find datasheet of this mosfet and can't find on ebay! I don't want to take the risk to put some PNP mosfet and 1 month later it coming back again! I hate...

R6950 it's ok and i'm sure to have contacts on j6950! SCL/SDA voltages Float - 3.417V to ~ 3.314V some times 2.9V R5280/1 = OK! PP3V42_G3H it's stable!

hey guys, this one won't charge! No liquid damage and no one touch before me! Already replace U7000 for a new one but without changes! in osx i can see the icon of battery change some time. Some times i have a X and some times i get he thunder as it was charging! And in "system report >...

thank you guys. I will try a new battery!

Hey , This one 1st time come with a bubble on u3200, i replace that one and go to the client but after 7 days comes again! I replace again U3200 and the machine comes to life again! when I start assembling the mac i noticed that mac don't show image. Now when i plug the charger or battery...

Hey guys, working on 820 00239, no liquid or components knockout! Don't charge battery or battery damage! need your's opinion! the subtitles is in Portuguese but i think it's noticeable! https://drive.google.com/file/d/1Bhkaxoge3x5vuKHdqA3SUW83-AXAjwDF/view?usp=sharing This machine...

hello, Working on 820 4924 with no backlight! i have found C7773 shorted and F7700 broken! Already replace the driver U7700 but same history! i noticed on pin1 PPVOUT_S0_BKLT = 12.3V and i have the 5.1V on L8300 when start! an suggestion ? thanks

Hey guys, Need to know if it's possible to access the data inside the SSD! The client forgot the password off SSD and the SSD have the icloud associate on them! I try to reset the password by Terminal but the machines ask me for the icloud password! Exist Docs to suport this SSD ?? If yes...

i forgot that, i needed to reconstitute the pads under the U7000 pin12 (PP_3V42_G3A) and pin11 (SCL) can this be the problem? I already tried fix the pads and replaced the U7000 3 times! for me looks well, but.... every time i replace u7000 + pads i always got 12.28V on PPBUS!

OK understood! before i remove the SMC the voltage on SCL oscillate 3.4V - 3.3V and on SDA it's 3.4V stable! i don't know if it's working properly or not! After that i remove SMC and check the continuity under pads but seems well! Now in your opinion should i reball the older SMC or the...

Yes, even with enable screw for battery i have ~0.250V! The Machine runs perfectly with charger connected but don't detect the battery! PPBUS remains on 12.28V.

Battery not recognize! I have a X on them in osx! Battery it's new. I have 15.70V on R7020 and 0.5V on PPBUS only with battery! R7000 = 2ohm

relatively to this one with a original charger (85W) the machine works well! But still have 12.27V on PPBUS! Already replace D6950 for a new one same history! Strange problem! what could be ?