Re: 820-00138 Orange Light won't charge
Thanks it measures 0v at R7012
wasaab
Member
Last Activity: 04-03-2023, 09:37 PM
Joined: 03-31-2020
Location: Wilton, CT
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Re: 820-00138 Orange Light won't charge
Replaced Q7180 and Q7010, still no change. Tried multiple chargers, also tried a new battery to make sure it wasn't that.Leave a comment:
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Re: 820-00138 Orange Light won't charge
So I check R7012 and have 0V, in looking at the schematic though I think you may have meant R7120 which is connected to the two current sense resistors on the ISL chip. Now when I measure this point I have 11V. I think we may be onto something here. I think you may be correct in thinking Q7180 is at fault. I will see if I have a donor board to swap this part out. Keep you posted as to the results. Thanks again for all the help everyone!...Leave a comment:
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Re: 820-00138 Orange Light won't charge
Had a chance to check R7012 and 0v is what it measures with no charger and battery plugged in.Leave a comment:
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Re: 820-00138 Orange Light won't charge
Thanks SimpleBeans, the charger model is a1424 85w charger. The computer is an a1398. I have checked the connector side of the battery and all checks out fine. SMC/NVRAM reset does nothing unfortunately. I am suspecting a bad mosfet as piernov suggested....Leave a comment:
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Re: 820-00138 Orange Light won't charge
Thank you reformatt, I will check this rail later and report back my findings, thank you for this information it is very helpful!...Leave a comment:
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Re: 820-00138 Orange Light won't charge
Hi Simplebeans thanks so much for the response. Yes it is the correct charger model A1424 85W MagSafe2 adapter. Battery status shows that it is just running on battery only. The green light goes out as soon as I plug in the charger. With the battery unplugged the board will power up and I get fan spin with orange light. The light goes out as soon as the battery is plugged in. No green light either. It seems the charger shuts off completely. Then I have to unplug it for a bit to reset it....Leave a comment:
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820-00138 Orange Light won't charge
Hi everyone, I have been working on a water damaged 820-00138 ISL6259 was replaced and now have PPBUS_G3H and fan spin without battery plugged in. L7130 measures 16.59V on AC power and 11.03V when on battery on L7130. When plugging in a genuine Apple charger the green light goes on for a brief moment and then turns off. Computer runs fine off battery. Another strange thing is when using a non-official charger the battery does charge. I am at a loss on where to look next. I was suspecting maybe one of the charging mosfets possibly? Q7130 perhaps? I was hoping perhaps someone with a bit better understanding... -
Re: 820-00138 High Fan
@Mayss so sure enough you were right on the money, swapped the trackpad out and now fans are back to normal, thank you for the assist on this one! I hadn't looked close enough at the trackpad until you mentioned this.Leave a comment:
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Re: 820-00138 High Fan
Thank you @mayss. Now that you say that I took a closer look at the trackpad. I replaced the top case of this computer with a refurbished one and looks like some of the components were knocked off the trackpad board by the refurbisher. This may explain the issue. I will have to get another trackpad and test this out again to make sure fans return to normal again. Unbelievable, I was trying everything and diving way too deep on this! Need to start with the simple things first. Thank you!Leave a comment:
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820-00138 High Fan
Hey everyone, so I have a 2015 820-00138 MacBook Pro in for repair that has been really been a pain. I replaced U7100 after a voltage rail issue from a water spill. Now the laptop turns on and runs, but fans ramp up to 100%. I can boot to the OS and ran Mac fan control and all temp sensors seem to be reporting correct. I sprayed each one with freeze spray and can verify the change to them. I replaced the FET that controls the fans with a known good one with no change. All temp sensors have continuity. I also removed the SMC and re-balled it and put it back on with no change in fan behavior. Board... -
Re: Need Bios for 820-3481-A
Ok so that is strange, made a bootable Ubuntu USB key and hangs on boot there also. I made a Windows 10 PE bootable USB key and that indeed does boot. This is certainly a head scratcher. Thanks again for your assistance with this. I am at a loss....Leave a comment:
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Re: Need Bios for 820-3481-A
So flashed your version and still same issue, hangs on boot about halfway. Bummer! Thanks for the effort, I really think I need a dump from a donor though. I have a feeling another area might be corrupt outside of the ME region....Leave a comment:
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Re: Need Bios for 820-3481-A
Thank you! I will try it today....Leave a comment:
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Re: Need Bios for 820-3481-A
Sure, here is the original bios dump and then one that I cleaned the ME region on. I am not having success with it however, and am wondering if another area of the bios got corrupted beside the ME region. The symptom of the iMac is it boots about half way and hangs, I have checked ram on another machine, CPU and SSD drive and all check out so far. Machine comes on and everything seems to be working except for full boot, both from recovery, usb disk and even imaging internal SSD. Thanks for any assistance with this....Leave a comment:
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Need Bios for 820-3481-A
Hi all, would anyone happen to have a clean bios dump from an 820-3481 a1419 emc 2639 they would be able to share with me? I would greatly appreciate it.
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