luckydip
Senior Member
Last Activity: 10-20-2025, 05:59 AM
Joined: 08-01-2016
Location: uk
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Many thanks đź‘Ť... -
Can someone upload 820-02890 schematics and boardview - alll lnks are dead - cheersLeave a comment:
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Can someone upload this as all the links are dead? thanksLeave a comment:
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any luck?...Leave a comment:
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will do, thanksLeave a comment:
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Macbook Pro 16" 2023 A2780 (820-02890) schematics and boardview request
Tried the links in previous posts but dead - so would be grateful if someone could upload the files. Thanks in advance. -
Anyone got a fresh bios I can try? thanksLeave a comment:
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MBPPF4NU18-FN10 Bios - PC Specialist TongFang
I need help with a bios for the above machine - Ryzen 7 14". I get fan spin, keyboard lights up and sometimes the screen works but is usually a black screen.
PC Specialist - P/N PC1-1847447
S/N 1847447001
Board number: MBPPF4NU18-FN10... -
L8230 and R8230 both visually ok and have continuity
U8100 appears clean and undamaged but I have a suspicion that it may have been fried with a over current pulse when L8430 was blown
Once again, thanks for taking the time.Leave a comment:
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Thanks for the reply.
PP1V8_AON resistance to ground 455k diode 435mV
Voltage
I2C_SMC_PWR_1V8_SCL 574mV
I2C_SMC_PWR_1V8_SDA​ 578mV
So does 1v8 come from U8100 or somewhere else?...Leave a comment:
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Forgot to say - no shorts on major power rails including PP3V8_AON_MPMU_ISNS_VIN, L8430 hasn't blown since replacement. Also noticed another coil L7700 (PP3V8_AON_SPMU_ISNS_VIN) is slightly wonky but reads fine and 3.8v on both sides.Leave a comment:
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Macbook Pro M2 820-02773 5v 0A
Working on this macbook, showing 5v 0A from charger - dead. Board is clean - no liquid, owner said he left it charging and died. Some voltages:
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After looking at board closely found L8430 damaged/blown open circuit so replaced it. No change, still 5v 0A - I'm thinking over current on L8430 (PP3V8_AON_MPMU_ISNS_VIN) killed U8100?
Tried connecting to another macbook but not in DFU mode. Forced DFU points have very low volatge so haven't bothered with that.
Any other ideas?... -
Are all voltages for U5420 steady?...Leave a comment:
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820-02016 DFU error 4014 - dead nand?
Working on a Air 820-02016, had extensive liquid damage around SPI/SOC which I hopefully sorted. Machine powers straight to DFU but when I restore get the 4014 error. Checked all the awake around NAND
PP0V88_AWAKE_NAND, PP1V25_AWAKE_NAND, PP2V5_AWAKE_NAND all present.
Any other power rails to check or dead NANDS? thanks​ -
Sorry to hijack this thread but its a NAND related question. Working on a Air 820-02016, had extensive liquid damage around SPI/SOC which I hopefully sorted. Machine powers straight to DFU but when I restore get the 4014 error. Checked all the awake around NAND
PP0V88_AWAKE_NAND, PP1V25_AWAKE_NAND, PP2V5_AWAKE_NAND all present.
Any other power rails to check or dead NANDS? thanks...Leave a comment:
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PPBUS_AON - If the voltage is approximately 12.28-12.35V, it may indicate a communication issue between the SOC and PMICs, or corrupt firmware
Not in DFU mode
PP3v8_AON​ 0v, voltages around U5700 seem ok, P3V8AON_PWR_EN present, PP5V2_P3V8AON_VDRV 0v which comes from PP5V_S2 - will this be needed for the CD's as well?
Looking at the CD's no LDO voltages, PP5V_S2_UPC 0v - generated from UF800. No enable signal from UF840.
Inputs to UF840:
PMU_SYS_ALIVE_1V8 - 100mV
UPC01_5V_EN - 0V
PP1V8_S2 0V. Looks like this...Leave a comment:
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PPBUS_AON - 12.3V (T2 non com?) , resistance to ground 2Mohm both sides, diode 453mV (820-02020 openboard has PPBUS_AON diode 504mV)
[MOD EDIT] Link to schematic - https://www.badcaps.net/forum/troubl...matic-brd-help​Last edited by SMDFlea; 01-14-2024, 09:11 AM.Leave a comment:
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Macbook Pro 820-02733 PP3v8_AON
This machine arrived trashed - someone had lifted all the shields and had a go - a mess. I thought it would be a good learning experience as I've never worked on these before. Most of the mess was around the U5700 area, other areas including CD's looked clean.
Initially when conecting charger - 5V drawing 0.4A - U5700 warming up. Removed it but found Q5820 shoted as well. Ordered all the parts and replaced U5700, Q5820 and Q5840 for good measure.
This area had missing components/pads destroyed etc - restored all I could see.
Started measuring around U5700...Last edited by SMDFlea; 01-14-2024, 09:09 AM. -
Macbook Air M1 820-02016
Right guys, working on my first M1. Came in with no battery (not sure why) USBC meter 20v 0.05A. Nand underfill removed, so may have been replaced/reflowed.
I know these draw little power on bench without battery so checked DFU. Stuck in DFU so tried restore/revive both fail with error 21.
Mac DFU Wiki states following:
Error 21 - Resolved with SoC ROM replacement. On macbooks with an M1 processor, this error also means problems with NAND chips such as:
- Failure of one or two NANDs.
- Mismatch between the NAND model and the... -
Re: apple configurator padlock
Thanks for this, once the original owner removed it, os installed fine.
Any tips on where I can check icloud status online?...Leave a comment:
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