LG LSMH207ST Service Manual page 15

Does the display operate?
No
1
When you push the any key,
is there any beep sound
No
Power Off
2 Is the connector connected
to PCB?
No
3
Is there any beep sound in
continuity test between the
power code and connector?
Code "L" to Pin3
Code "N" to Pin5
No
Go to No.8 of
Yes
this flow chart.
Go to No.8 of
Yes
this flow chart.
Check PCB
Yes
Go to No.8 of
this flow chart.
N N N N N N N N N N N N N N N N N N N N N
N
L L L L L L L L L L L L L L L L L L L L L
L
4
Is there any beep sound in
continuity test between the
ends of thermostats? (Oven,
Heater, Magnetron)
Oven Thermostat
Magnetron Thermostat
Heater Thermostat
Yes
-15-
Replace the
No
thermostats.