820-02020-11 touchbar only shows green vertical stripes

mbcontrol

Member
I refurbish a 820-02020-11 which had a bad liquid damage. I'm short before to finish it. My last problem (i hope so) is the touchbar - it only shows green vertical stripes (see picture attached).

Unfortunately I don't have a known good touchbar. So i tested the board with three different touchbars (theoretically they could all be damaged).
One of them shows nothing - probably dead. The other two touchbars shows the same picture - only green stripes.

How could i go about troubleshooting here?


2021-11-16 mbr-20141 touchbar green stripes.jpg
 

2informaticos

Administrator
Staff member
So you get exact same behaviour with original touchbar and two more.
Even all are bad, is really strange to have the same problem.
However, should be good to test with known good touchbar.

As backlight is present, the problem (if is on the MLB) should be related with data lines of JT700.
If liquid spill was from top of keyboard, very likely touchbar was affected.
 
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