I have a problem with my Mac A2251 when I download a Mac version, it asks for an update from the Internet, and when I connect it to the Internet, it starts downloading and after a quarter of an hour it restarts and every time it does that until an error message 2100F appeared I checked the temperature of the device intact and there is no high heat, can I help solve the problem.
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You have an internet / wifi connection issue. Consider to use a USB ethernet dongle or fix your wifi connection.
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Hello everyone, I have a MacBook Pro 13” 2020 (Four ports) (Model A2251 with the 820-01949-A logicboard). It had some minor liquid damage but I carefully cleaned the logic board with alcohol and let it dry as needed. Now I encounter following situation: The MacBook does start but the Battery is not charging when a cable is plugged in any of the ports (I use the powerbrick and cable that came with the device). It had some charge left, so I could safe some data, but I was limited my the 13% and the speed of airdrop. The liquid-damage is almost only limited to the side of the logic board where... -
The MacBook does not boot. It is restored via DFU without errors. The MacBook charges and consumes 20V/2A. There is no sound when connecting the charger. The caps lock does not light up, but the touchpad clicks. The fans do not rotate. No signs of life. Please advise.01-05-2025, 03:11 PM
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Hi Dear friend., I am working MacBook Pro A2251 Logic board 820-01949-A. The history was that there was slight liquid on the LHS CD3217 & was not powering on at all. No 20v or any amps. I replaced with known good CD3217s & then got the power but its stuck on 5V .18amp. I did power measurements which are below:
PPBUS_G3H=12v
PP3V3_G3H=3.3v
PP3V3_UPC_X_LDO=3.3v
PPDCIN_G3H=5v ????
PP1V8_SLPS2R=1.8v
Do you think the other RHS CD3217 have to be replaced to as they might have gone defective???? -
i have a macbook a2251 820-01949-a 5v stuck with 0.274ma
some measured volt
PP3V3_G3H_RTC=3.3v
PP3V3_UPC_X_LDO=3.3v
PP1V8_SLPS2R=1.8v
PPBUS_G3H=12v
PP3V3_G3H=3.3v
P5VP3V3_VREG3=3.3v
PP5V_S5_LDO=0v
PP20V_USBC_X_VBUS=0v...10-24-2024, 02:29 AM -
Hi there, I had a MacBook Pro 13" 2020 A2251 at work, and it suddenly stopped working without having being bad to it (I ride my bike everyday though). I replaced the motherboard so now it works again, but with other data. I would like to repair the 661-15938 motherboard. I spotted where it burned, I saw that there is a post where there are the 820-01949 pdf and bvr but I don't know what to do with it. I tried to install OpenBoardView because it seems like it's what I should use to have a look at the schematic view of my motherboard. But I failed:
But surely some people on this...
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