Exchange CPU U101
3.2 Touch panel fail
Exchange CTP, test the CTP
workable？
Check CTP connector & EMI filter mount
ok？
Oscilloscope
Use
Y
CTP fail
CTP test fail？
N
N
N
to check I2C signal
N
Exchange CPU
Y
CTP damage，
exchange
CTP fail
Exchange CTP
Y
Re- mount the
connector & EMI
Filter
14
