Question about LG Televison & Video
The TV shut off during operation. The SMPS was broken. I renewed the broken FET, the switching regulator IC and the gate resistor. the PSU seems to be fine. When I apply mains the TV blinks 3 times. Nothing else happens. There is no backlight, no audio, nothing else than the LED and the IR receiver seem to work. Any ideas what else I can do? By the way all caps are at at least 90% capacitance and there are no short-circuits in the mainboards power in connector. I am experienced professional audio electronics engineer but here I have no clue.... Best regards Stefan
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Posted on Jan 02, 2017
Hi this might not be a motherboard problem. Remove the memory card and clean the contacts and reinstall it. If this will not work for you replace the memory card with the same type you have in your computer. Hope this info will help you solve the problem
Posted on Aug 17, 2009
Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.
Posted on May 18, 2016
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None TV is powered off. Normal operation.
Green TV is powered on. Normal operation.
Green 1. TV just plugged into AC outlet.
Wait until blinking stops before turning on (approximately 1
minute). Normal operation.
2. AC just restored after power failure.
3. TV Rebooting after System Reset was
4. TV Rebooting after power fluctuation
or receiving abnormal digital signals
from digital channel, or digital device.
5. You have begun the procedure to
update software from an authorized
flash memory device.
For detailed information, see the instructions that accompany
the authorized software update. IMPORTANT: Do not
use unauthorized software at any time.
Green TV just powered off and lamp is
Starts to blink 30 seconds after turning off TV. TV can be turned
on before blinking starts or after blinking stops, but not while the
indicator is blinking. Normal operation. hope it helps regards shaun
Green TV powered off and auto-on timer is set. Normal operation. TV can be turned on at any time.
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