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The power can not be on or off
The power can' t be
Check the power supply
on the power board is
normal.
Check if the CN1 on the
front board to CN2 on the
decoder board is in good
contact.
Whether the connection
to S1 is broken.
Whether there is 0V and
3.3V voltage difference on
Pin 62 POWER_K of U3.
on or off
Go
Yes
Yes
Yes
No
Yes
4-2
No
Repair the power board
No
Check/Correct
connection
Yes
Correct the connection
No
Replace U3.
Trouble shooting chart
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