Good evening,
I have LG 42LV5400-UB that suddenly stopped working.
It successfully powers on with the touch panel or remote (power LED is white) but there is no video nor sound.
When it powers on I hear a click of relay but no backlight seen from the rear panel in the dark.
Measured voltage on the connector P501/502 between the main board and PSU, all seems good.
PWR_ON is 3.3V
All other voltages 3.5V, 12V, 24V are OK as indicated on the attached picture.
INV_ON (Pin 18) is 0.6V
If I understand properly the latter corresponds to High for this model. (see the attached picture)
Right? So it is Ok.
Voltage on two big capacitors in the top part of PSU is 79V.
I followed the service manual troubleshooting process (except frequencies measurement) until "Change module".
Does it mean the LED panel is dead or still something else?
Mainboard: EAX63333405
Power board: EAX62865401
I have LG 42LV5400-UB that suddenly stopped working.
It successfully powers on with the touch panel or remote (power LED is white) but there is no video nor sound.
When it powers on I hear a click of relay but no backlight seen from the rear panel in the dark.
Measured voltage on the connector P501/502 between the main board and PSU, all seems good.
PWR_ON is 3.3V
All other voltages 3.5V, 12V, 24V are OK as indicated on the attached picture.
INV_ON (Pin 18) is 0.6V
If I understand properly the latter corresponds to High for this model. (see the attached picture)
Right? So it is Ok.
Voltage on two big capacitors in the top part of PSU is 79V.
I followed the service manual troubleshooting process (except frequencies measurement) until "Change module".
Does it mean the LED panel is dead or still something else?
Mainboard: EAX63333405
Power board: EAX62865401
Comment