can the wifi chip (u3700) be replaced on 820-01521 without an issue? or does it have to be reenabled or something?
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Hello,
I have a MacBook Pro M1 A2338 820-02020. It boots to OS but WiFi/Bluetooth are non-functional (exclamation point through WiFi symbol in menu bar) and the display is not working.
Starting at the WiFi chip... PP3V3_S2_WLBT_ISNS is fluctuating at around 2.4V. No shorts detected around UL000.
PPBUS_AON is 12V steady, but PPBUS_AON_3V3_S2_VIN_ISNS (measured at CC721) is 2.76V.
LC710 is getting 2.4V at P3V3_SW, which explains PP3V3_S2 fluctuating around 2.4V.
No detected shorts around UC710.
This makes me believe that RD560 has failed and... -
MacBook Air A1466 EMC2925 (820-00165-A) Shorted PP3V3_S0
1. Problem of macbook is No Display
2. Found shorted caps on c1212
3. After removing the shorted caps (c1212) the reading in the c1212 pin1 is .003 in diode mode test, still shorted.
4. Help me..... -
Hello. If you could please help me understand what I am doing wrong...
This model, Macbook Pro 2019 16" A2141, 512GB, EMC 3347, with T2 Security Chip, had 4 NAND Chips shorted in 1 wing (U9100, U9200, U9300, U9400) and it has 1 more in the 2nd wing (U8600) BUT NOT shorted. All chips are TSB4227 TOSHIBA-KIOXIA SN4192TWNA12014 BGA110 128GB. I got 4 new nand chips for 1 wing and programmed them by specific position of course with JCID P13 programmer.
I also replaced the tps power ic for the ssd.
Now all rails come up, including the ssd rails 0.9v, 1.8v, 2.5v.... -
Dear all,
I have taken out the motherboard of a Acer TravelMate P214. There is a short to ground on the main power rail (19V). I don't have the schematics or boardview for this board (DAZ8IMB1AA0 REVA). But I have found 4 MOSFETS close to the main power rail : 2 N-Channel and 2 P-Channel.
I have checked resistance across each of the 4 MOSFETS. I have the following readings:
Both N-Channel Mosfets: nothing odd
P-Channel MOSFET number 1:
source - drain : 117 kOhm
source - gate: 96 Ohm
gate - drain: 117 kOhm
P-Channel MOSFET... -
Hi,
my MacBook Pro 15" 2018 Touch Bar (A1990) doesn't charge anymore. Board# 820-01041-A
I'm not experienced in diagnostics, but I want to try to solve the problem with your help, because every local shop charges around 600€ (650 usd). Which is the value of the whole Macbook.
The Macbook was charging when suddenly the "charging sound" appeared every other second for around 4-5 times.
After that the Macbook was dead. It isn't charging anymore.
The USB-C Port where the charger was plugged is burned. Also The Cable and the...