LE 42LE5400 - no sound/picture

[jj14]

Re: LE 42LE5400 - no sound/picture

Thank you. Found the resistor on ebay - will try that out and report back in a few days.

[budm]

Re: LE 42LE5400 - no sound/picture

You do not have repair shops or Radio Shack close by?

[jj14]

Re: LE 42LE5400 - no sound/picture

all radio shacks within 50 miles of me shut down several months ago. I don't know of a repair shop that would sell resistors - but I can ask them if they'd make an exception. Thanks for that suggestion

[jj14]

Re: LE 42LE5400 - no sound/picture

You need to disconnect just the DRV_ON wire that goes back to the main board first, then use 1K 1/4W (or larger will be fine) resistor between the standby (3.5V) power supply pin and the DRV_ON pin of the power supply, plug the TV into the outlet and turn on the TV to see if you will get backlights.

As soon as I plugged the TV in (after making the connections as you described, with the resistor), the backlight came on!

(I then used the remote to turn the TV on - just to see if I'd get the boot up animation or the menu - but nothing else worked - the backlight stayed on).

Does this mean that it is the main board that is faulty, and that replacing it should get the TV to work? (with the backlight on, should the TV have been functional?)

Thanks

[budm]

Re: LE 42LE5400 - no sound/picture

That means beside the failed BL-ON command signal you also have other problems as well, if it is just the failed BL-ON then you would have pictures and sound and all other functions of the TV, so you do need new main board.

[jj14]

Re: LE 42LE5400 - no sound/picture

Thanks. I'll look for the main board replacement. shopjimmy doesn't have the board (with low chances of it being in stock) - will need to look at eBay - will try LG directly as well.

I appreciate your help with this.