Got an A2141 MacBook Pro 16" computer turns on however the track pad clicks but the keyboard has no life, NO LIQUID DAMGE whatsoever. Trackpad does click but the OS loads but the trackpad won't move the cursor, the keyboard is unresponsive. I replaced the cable and the trackpad to see if that was the issue but it was not, I went to see if the CAPS LOCK would turn on but it does not. Any indication what this is? I went and tested the lid sensor but nothing else. Battery holds a charge, fans spin normally, and lcd is good. I can use external mouse and keyboard without issue.
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MEOWING IN THE IMPOSSIBLE UNIVERSE! -
Answer selected by Stephen at 05-06-2025, 01:20 PM.
Well T2 chip is the issue. RIP I got the DFU restore error with the U67 chip removed to verify and you can tell it failed. Going into parts I guess. -
Keyboard decoding is performed by:
U6701
U6702
Review they are being powered and mating properly with the connectors / cabling.
Review the SMBUS line voltages for each of these IO expander chips.Comment
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I believe I resolved... before you got back to me...I will test this if not. I was thinking about the T2 chip is the issue.sigpic
MEOWING IN THE IMPOSSIBLE UNIVERSE!Comment
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Ok so yes DFU restore forced it to fail. Meaning I have an SPI issue somewhere. I am going to look around and find. I know these U67 chips need to work to communicate with the T2 which results why it was failing the restore.sigpic
MEOWING IN THE IMPOSSIBLE UNIVERSE!Comment
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Well T2 chip is the issue. RIP I got the DFU restore error with the U67 chip removed to verify and you can tell it failed. Going into parts I guess.sigpic
MEOWING IN THE IMPOSSIBLE UNIVERSE!Comment
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