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No display on LED, and buttons do not work.
No display on LED, and
buttons do not work.
Check whether there is
correct contact between
CN7001 and CN100.
Check VCC(+3.3V) voltage on
the Power and Front board.
Check there are SCK, SD
and SI signals on CN100
on the Front board
1.Check whether bad solder exists
on IC101 and pins of LED,
2.Check whether the circuit connected
to SW100,101,103,106 is broken.
Replace IC101 or LED or
replace Front PCB.
Yes
Yes
Yes
Yes
Yes
11-7
No
Correct connection.
Fix power supply board top a power
No
supply for should electric circuit or
replace Power PCB.
No
Check the IC4001's pin J5,H5,H6
arrive the CN7001 connect condition.
No
Correct connection.
Trouble shooting chart
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