Question about LG Televison & Video
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Posted on Jan 02, 2017
Did you have any luck? My LG is stuck in demo mode too. Menu button doesn't work, and keylock was on as default so I can't use the buttons on the TV itself.
Posted on Nov 30, 2009
It is possible that the tact switches are defective, buty to have 2 fail in the same manner at the same time is extremely rare. More likely there is a problem with the 5V line from the power supply that is allowing some AC current to flow onto the 5V DC line. I can't confirm this without actually seeing the set and taking measurements, but try changing the volume using the remote, if the behavior is the same as with the fron butons, then have a servicer check the 5V DC line.
Posted on Dec 08, 2009
SOURCE: we have a samsung tv
Similar to this? http://www.scribd.com/doc/25276757/E40951307-TCON-Troubleshooting-10-22-09-OPT
It can be T-CON, Power supply, LCD panel.
Learn more about T-CON/LCD panel here (not just for SONY TV):
http://www.mediafire.com/?zzjygannjty PDF download
Also read my guide:
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:
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
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.
Posted on Jun 11, 2011
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