Hello, i have a batch of 10 Macbook Pros A2179 bought from a Costco return wholesaler.
The 10 of them show the exact same behavior;
They auto power on, to internet recovery spinning globe, fans to 100%.
Power consumption on USB-C port is 0.43a, shuts down as soon as unplugged. Battery doesn't charge at all. However, it boots to 20V on the Ampmeter.
Based on their iBridge versions (4.x and 5.x) these were shelfed for a long time.
All of them power on the same way; 100% fans, shut down as soon as they are unplugged. Removing the back cover shows the battery has 4.x volts directly on the + - solder blobs.
Internet recovery will not complete in any way, bought an official Apple USB Ethernet Adapter, stuck always at 24:00 and never progress on any of them. Battery is the issue i think
Impossible to boot from USB either, T2 machines and this disabled via T2 firmware by default.
So basically, i'd like to fix the battery issues ! 10 new batteries is 700$ down the drain.
What i'm wondering is; these batteires have firmware, i have seen MBRT the macbook repair tool which fixes the flag in the battery firmware to repair them. However, that's another 350$ again.
Is the firmware the issue or simply the batteries have drained ?
I have revived several batteries in the past using a DCPS on ipads, simply by 'jump' starting the batteries injecting 4.2v to them, and with good success, when ipads have been shelved for a long time.
If anyone can chime in on this, i'd be happy. Thanks ! Vincent
The 10 of them show the exact same behavior;
They auto power on, to internet recovery spinning globe, fans to 100%.
Power consumption on USB-C port is 0.43a, shuts down as soon as unplugged. Battery doesn't charge at all. However, it boots to 20V on the Ampmeter.
Based on their iBridge versions (4.x and 5.x) these were shelfed for a long time.
All of them power on the same way; 100% fans, shut down as soon as they are unplugged. Removing the back cover shows the battery has 4.x volts directly on the + - solder blobs.
Internet recovery will not complete in any way, bought an official Apple USB Ethernet Adapter, stuck always at 24:00 and never progress on any of them. Battery is the issue i think
Impossible to boot from USB either, T2 machines and this disabled via T2 firmware by default.
So basically, i'd like to fix the battery issues ! 10 new batteries is 700$ down the drain.
What i'm wondering is; these batteires have firmware, i have seen MBRT the macbook repair tool which fixes the flag in the battery firmware to repair them. However, that's another 350$ again.
Is the firmware the issue or simply the batteries have drained ?
I have revived several batteries in the past using a DCPS on ipads, simply by 'jump' starting the batteries injecting 4.2v to them, and with good success, when ipads have been shelved for a long time.
If anyone can chime in on this, i'd be happy. Thanks ! Vincent
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