TurboChef Eco - No Display - Screen Is Blank

Troubleshooting:
No Display – Screen is Blank
Are any of the LEDs on
the back of the display lit?
NO
NO
YES
YES
NO
NO
Is the power supply
output 24 VDC?
NO
YES
YES
Is the control board
receiving correct VDC?
Verify voltage on pin 2
of the J7 connector is 24
VDC (See page 63 for
schematic).
Replace the F1
and/or the F2
fuse.
Return the oven
to service.
Check wiring from
the power supply to
the control board.
Correct wiring if
necessary.
Is the power supply
receiving power? (Is the
green light on?)
Replace the power
supply.
NO
Is 5 VDC present on pin
1 of the J7 connector? .
YES
Replace the I/O control
board (Sage).
Replace the UI
control board
(Phoenix).display.
Replace the
display.
NOYES
Replace the
power supply.
Is the display white or
does it have stripes across
it?
YES
Unplug the oven for 20
seconds and plug it back in.
Did the display come back?
NOYES
Does the oven beep
repeatedly while the display
is blank?
Replace the I/O control
board (Sage).
NO
Replace the 4-pin
communications cable between
the display UI control board
(Phoenix) and the I/O control
board (Sage). Did this fix the
problem?
TROUBLESHOOTING
55