Mabot17
Member
Last Activity: 04-19-2025, 12:44 AM
Joined: 03-16-2023
Location: MILANO
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Hi i tried the bios posted here but it's not working so i made a new post -
Hello,i need a working Bios for this All in One pc,motherboard version is Eiffel_2_ICL 19450-1 348.OCW10.0011
The model number S/N is : DQBERET0011230054F3000
Thank youLeave a comment:
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My Board has a different layout,can’t compare diode mode values,but mine seems all good,the problem could be the cd3217 that i have replaced that is a new one and not compatible,the short is gone and now i have 5v and about 190mA on both usb-c ports(stable).Leave a comment:
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A little update,
I tried to revive the Mac using Apple configurator 2, I did various tests but nothing, no DFU screen, nothing at all. Now only the last resort remains, and that is to find an identical chip from a donor board with the same serial code. I have doubts, do you think I will have to replace the pair or will just the faulty chip be enough? Will I also have to flash the ROM with the programmer? Honestly I don't want to go crazy about it, but from the measurements I took the Mac doesn't seem dead, like a fried CPU so it's a real shame,
greetings
MauroLeave a comment:
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Thank you,this is a very informative video.
I had seen the iboff video on the repair of the 7 Macs a few days ago, but I missed the one on the CD3217 because I didn't yet know what to expect.
Directly from iboff:
[B]seeing more and more MacBooks were dead because of blown USB-C Controller CD3217, as it does affected by several factors explained in this video, and also why the repair will be quite expensive.
Note: Before you asked did we changed the small IC ROM for CD3217, yes we did and nothing changed. Secondly, it doesn't matter between Small Dot CD3217...Leave a comment:
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Ok, next week I'll try to get another Mac to try Apple Configurator 2 and may luck be with me, for now I thank you so much for the precious advice, I know that time is gold, I at least hope that it can be of help to other people with the same technical problems as me, goodbye for now and have a good weekendLeave a comment:
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Can you explain me how to do the DFU?Leave a comment:
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All big coils are pretty high resistance,and i also measured coil soc and ausiliary power supply voltages using this template and they are all good and stable...
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Good day,actually i’m using this setup to power on logic board,DC power supply set on 20v 3A,and BY-3200 power cable....
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Measured at test points,
3,255V and 1,794V stable
PP3v3LDO gives 3,437v stable.Leave a comment:
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hi I found a new CD3217 chip on ebay, I replaced it, the short disappeared, now I have stable voltage values in both controllers. 3.3v and 1.5v on the input caps are now present and I also have a stable 5v on the 2 output fuses. PPBUSAON measures stable 12.27v, 3.8v and 5V are present and stable on the coils. Unfortunately, however, I'm still stuck at 5v and the board doesn't boost at 20v. I don't know, it could be the chip is not compatible, or is the card in DFU? how can I check?Leave a comment:
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Aww that is a bad news,because i don’t have a donor board,hmm maybe i will try gambling on Aliexpress or some ebay seller that has it on stockLeave a comment:
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Ok it seems that UF400 is heat up in the left upper part of the chip,it does not draw much current,power supply set at 1V 1A,it only drops voltage from 1v to 0,8v and heats up,but i’m not 100%sure because i use a shortkiller and current is pulsating injected due to avoid short damage,but something is really going on that chip...
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PPBUS_AON reads 12,27V on F5200 fuse.RTG is high on both sides,circa 0,8 Mohms.
Ok injecting a bit of current is a good idea,so if only the cd32 will heat up i will know for sure that is defective?Leave a comment:
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Hmm what you suggest now? Remove UF400 to confirm that is internally shorted?Something else?what EEprom UF260 does to CD3217,is that some sort of bios?I saw a guy on youtube that sell a programmer for UF260 to solve 20v boosting issue,could it be related to my problem?Leave a comment:
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Thank you for the help guys,i removed the cap,but no luck hehe line is still shorted.Cap is good and it should be 10uf if i measured it right.Leave a comment:
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I found this cap near UF400 that is almost short in diode mode,it reads 0,0046v(those caps nearby reads ok in diode mode CF409 CF405 CF505 CF508 CF509,they reads all about 0,500v )....
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MacBook PRO M1 A2338 stuck at 5V
Hello,i want to repair this mainboard mod.[B]820-02020[/B].It is visually speaking in perfect condition,no signs of damage burn,no spilled,no corrosion,and i'm pretty confident that nobody has opened the device before.
The problem is that is not booting at all,and it's not boosting to [B]20v.[/B]
Can you help me to do a correct diagnose of main voltage rails (AON and others),to track down the issues?
i have tools boardview and schematics so i can do measures no problem,
i know that i can do that and learn with your help,
one important note
i attach pics of the... -
WOW thank you so much i really appreciate thatLeave a comment:
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How did you do that??Thank you so much you're great!!Leave a comment:
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