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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
between XS2 and XP1
Check
voltage on the power
and front board
Check there are STB,
SDA and SCK signals on
XS2 on the front board.
1.Check whether bad solder exists on
pins of LED,
2.Checkwhether the circuit connected
to K1, K2 and K3 is broken,
3.Check whether R303, R304,R305 on
front board are open-circuit.
PressXP1 or replace LED
Yes
contact
Yes
VCC(M5V)
Yes
Yes
Yes
4-6
No
Correct connection
Fix power supply board top
No
a power supply for should
electric circuit
Check the U1's pin 51,52,53arrive
No
the XP1connect condition
XP1 (PIN 2 CLK)
XP1(PIN4 DOUT)
No
Correct connection
Trouble shooting chart
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