Replaced USB-C side board, touch screen goes nuts
01-09-2021, 02:33 PM
Back when I replaced my cracked screen I managed to damage the vibration motor attached to the USB-C board. Not a really vital function, but I went ahead and ordered another board to replace it.
After installation there is still no vibration, but the worst part is that the touch screen has become erratic. It acts as though an "invisible finger" is giving it random input and doesn't react predictably to real touch. I reseated cable connections on the USB board and main board but still the same result. Also tried booting off an SD card rather then eMMC with no change. (It didn't seem like a software problem but I wanted to make sure.) Putting the old USB board back in also didn't change anything.
So... what is the most likely thing I messed up while in there?
After installation there is still no vibration, but the worst part is that the touch screen has become erratic. It acts as though an "invisible finger" is giving it random input and doesn't react predictably to real touch. I reseated cable connections on the USB board and main board but still the same result. Also tried booting off an SD card rather then eMMC with no change. (It didn't seem like a software problem but I wanted to make sure.) Putting the old USB board back in also didn't change anything.
So... what is the most likely thing I messed up while in there?
