TV controls do not work

http://www.shopjimmy.com/lg-ebr76384101-keyboard-controller.htm

Good day Mr.Daniel Navarro..

The picture below is the sample 42" plasma TV (internal parts)..

If your TV won't adjust volume or change channel by pressing button on the front panel..The problem could be the digital control board,it is the one that have a rectangular red on the image shown..

But before you replace the board make it sure that the control button assembly is properly connected on the said digital control board ( no loose connection or loose solder)..

Also try this remedy:
If you have remote control you can use it for the mean time to adjust the volume and channel so that you don't need to replace the digital control board..

Hope it helps..

Thanks for using fixya and purchased my service..Please don't forget to rate my answer..

It sounds like it has main board problem, leave it unplug for about an hour to let it reset itself to see if it will work again. It can also be unstable power supply problem.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

I presume that the volume will not turn down from either the remote control or the volume buttons on the side of the tv. If the volume down button works on the side of the tv then the remote control is suspect to be faulty. If neither remote or tv volume buttons work then check whether the channel buttons work on the tv (not remote). If none of these work then check the input connection from the buttons /infra red reciver to the main pcb. This is a push on cable connector. As a point, also check that the volume up button on the tv is not stuck in, and feels the same as the other buttons when pressed.

I had this same issue, and solved it by putting the TV in "Theater Mode', which can be acheived by hitting the "Theater" button on the remote.

you unplugged the front panel with the buttons on it and the remote reciever
you have to slide the chassis out
reach in to the front and replug the front panel to the plug from the main board
then slide all boards back in place

Leaky tact switches on control panel. Part number is 242212802742. Takes 6. They will cost you around 6.00 a piece. Lower front panel pulls off. Be careful as there are two cables attached to htis panel. This should take care of your issues.

Pete....Digital TV & Radio in NC

ARGOS SELL SPARES FOR ALL REMOTE CONTROL DEVICES ON THE ARGOS SPARES SITE. PRICEY BUT WORTH IT!

if you still have a problem (and the tv!) email me at gmail.com

the tacticle (micro switches)on the front of the main chassis have most likely gotten wet at some time,I suggest replacing them all.