Optical Display Does Not Turn On - Power Is Available - Norcold N500 Service Manual

Optical Display Does Not Turn On - Power is available - N510
Check for control voltage
across power board
terminals 12VDC and GND 1.
Check for control voltage
across optical control wire
harness connector white/red
wire and white/violet wire.
Check for control voltage
across power board wire
harness connector white/red
wire and white/violet wire.
Push and hold OFF/ON
switch, then check voltage
across wire harness optical
control connector blue and
white/violet wire.
Release the OFF/ON switch,
then check voltage across
wire harness optical control
connector green and
white/violet wire.
Check optical control
display operation.
N500/N510 Models
NO
12 Vdc
present?
YES
NO
Check condition of power board fuse F1.
12 Vdc
Replace fuse if open (blown).
present?
YES
NO
12 Vdc
present?
YES
NO
Replace optical control display circuit
12 Vdc
present? board. See page 47.
YES
NO
12 Vdc
present?
YES
NO
LED
Replace optical control display circuit
illuminated?
board. See page 47.
YES
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Correct 12 Vdc voltage input to
power board.
Replace power board. See page 43.
Replace power board. See page 43.
Refrigerator operating as designed.
Refrigerator Service Manual