Brother TD-2020 - 2 ] the Power Supply Does Not Turn on

IV - 3
[ 2 ] The power supply does not turn ON.
Y
The power supply does not turn ON.
Did you solve a problem
by replacing the main PCB
ASSY?
Y
N
N
Are all harnesses
connected correctly?
Correct the connection.
Y
N
Is the cable of
AC power supply or battery
connected correctly?
Is the main power
switch ON?
Correct the connection.
Turn ON the main power switch.
The panel PCB is defective.
Replace the panel PCB.
The main PCB is defective.
Replace the main PCB.