Hello, I have this weird issue with an M1 MacBook Pro motherboard number 820-02020 when I plug an USB key or a dongle for external screen, etc it doesn't do anything. I wanted to reset it but it doesn't see any USB Monterrey or Big Sur install key. Even in DFU mode the other computer with Apple configurator doesn't see it. And this apply on both USB-C ports. But the charger works normally. Any ideas?
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Re: M1 MacBook computer doesn't rcognise any USB devices
Hi.
1) The USB Type C charger works ok to charge the laptop so the port is able to negotiate the power delivery contracts using the CCx lines.
2) The review should be with the external conversion hub you are using to interface with the Type C connector to convert to the type A for your USB pen drive (memory stick).
Does this hub work with other laptops ? Maybe it requires an external power supply to function ? -
Re: M1 MacBook computer doesn't rcognise any USB devices
Do you see USB LED flicker when using the external memory stick ?
Confirm the voltage of the Vbus rail for the USB connector.
Confirm that the paddle board is properly seated onto the main logic board.
After the above, remove all power. Meter in Diode mode.
Red meter lead to ground.
Black meter lead to D+ of the USB connector - post the reading.
Black meter lead to D- of the USB connector - post the reading.
Start with confirming if the USB port is receiving the power from the logic board.Comment
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Hi everyone,
I have a MacBook Pro A1989 that was likely exposed to liquid. It doesn't display an image on the built-in screen, but the screen is backlit (you can't see the Apple logo or any other elements when held up to light). The laptop provides 20V and 1.5-2A, and it works fine when I use it with an external monitor. Currently, the connector for the display (J8500) is disconnected. I'm writing to ask for help in diagnosing the issue. I've heard that when the J8500 is exposed to liquid, the processor pin responsible for the display might short-circuit, and I'd like to know... -
Hey everyone,
I bought a MacBook A1990 with no screen. I bought it knowing the motherboard was defective but wasn't sure what the problem was until I received it. It actually turns on but as you see from the attachment, it has vertical stripes, on an external screen!!
The board is neat. Not opened before for sure. Just a little dust, nothing more.
Recovery using wifi can be opened, as can also be seen in the photo but it doesn't go all the way through after connecting it to a wifi. It downloads the initial Recovery files but never completes the rest of the... -
Hi everyone!
I have a 2018 MacBook Pro (with Sequoia OS) that I've been using for years with no problem. I recently received an M2 MacBook Pro so I'm mostly using it and not the 2018 one, but since a friend of mine needs a computer, I thought I could restore my 2018 and give it brand-new-like to my friend.
I tried using the built-in tool to restore the MacBook (Settings > General > Transfer or restore > Delete) but it got stuck when trying to remove the Find Device configuration (it asked me for the password for my old Apple ID -now I use the same account but...06-27-2025, 08:54 AM -
I have a 2020 Macbook Pro A2289 and after many attempts managed to get it into DFU mode, using my older 2017 A1706 Macbook Pro (Running Ventura 13.7.8). However, when attempting 'Restore', it fails at step 4 of 4, showing the following error:
- "The operation couldn’t be completed. (AMRestoreErrorDomain error -1 - Failed to handle message type StatusMsg (Generic error)) [AMRestoreErrorDomain – 0xA (10)]
- "The system cannot be restored on this device. Failed to create new state machine for restore [com.apple.MobileDevice.MobileRestore - 0xFB1 (4017)]
...08-30-2025, 10:27 AM -
Hi,
I am working on a MacBook that came in for a screen replacement. The MacBook powers on and works on the external screen. However, the screen stays black. The replacement screen made no difference. On further investigation, I found small amounts of corrosion.
Please see the attached image.
I ordered a refurbished logicboard, but the problem didn't go away with the old or replacement screen.
Can anyone suggest where to go from here?...
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