KB/TP work in USB mode, before loading macOS (boot menu)?
Keep out U6855 and bypass R6854 pads.
Let see if this tricks the T2.
Keep out U6855 and bypass R6854 pads.
Let see if this tricks the T2.
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820-01598 no keyboard or trackpad
- Thread starter tcampbell34
- Start date
tcampbell34
Member
No the trackpad does not work even in boot menu.
I did what you said, but still same thing. No keyboard or trackpad
I did what you said, but still same thing. No keyboard or trackpad
TP SPI data lines don't go directly to T2.
But who knows, level shifters may got damaged and affected T2 too.
Maintain the bypass and try changing U6860.
But who knows, level shifters may got damaged and affected T2 too.
Maintain the bypass and try changing U6860.
tcampbell34
Member
I tried another trackpad from an A1708 because I was not sure if the trackpad I was testing with was actually good or not. With the A1708 trackpad, it works in the boot menu, but then does not work in the OS or recovery mode.
macOS accesses TP through SPI bus and you have missing the required enable signal.
Did you test maintaining R6854 bypass?
Did you test maintaining R6854 bypass?