Question about Televison & Video
Get sound but no picture. keeps coming up on screen hd not supported
Posted by Anonymous on
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Posted on Jan 02, 2017
is this a lcd/or pl/ crt,
if crt you can see if you have g2 look at the nick of the tube to see if the filment are lit up
so tack off the back now plug the tv in now hook up cable to it now tune it on .how look at the nick
you see the ken bord on back of your picter tube.
if you see a glow you have g2. on the flyback you see screen livi. ture it up a litte. and see if pix come back if do then you fix it if you saee a line then v.ic is bad. if the ic is bad you will not git a pixt
Posted on Aug 10, 2009
You have an AC resistance problem on the interface board. Passive components such as silver mica and electrolytic capacitors are not charging and discharging properly. This causes a delay or disruption in the start-up process. Byte signals are weak and intermittent due to other thermal components failing such as 'diodes, smd mosfets,...etc...''' Believe it or not this happens from manufacturers using 'inferior-grade' circuit components that fail under considerable load conditions. By replacing a few parts with better quality parts will solve this issue for you. To replace these parts requires removing the back cover and using some test equipment. If you can get someone who is technically proficient I can e-mail them instructions on how to fix this problem on the circuit board.
Let me know if you want to follow up on this...
Posted on Dec 07, 2009
SOURCE: sound but no picture
Most likely you have an inverter problem. The inverter powers the backlights so that the picture can be seen. You can try holding a flashlight close to the front of the screen in a dark room and if you can see any trace of a picture, the backlights are not lit. This can be a pretty hot circuit to work with. Have a shop check it out for you. Thanks for using fixya.
Posted on Jan 12, 2010
SOURCE: tv keeps turning on and off
You probably have blown capacitors on the PSB-power supply board. Recaping with new UF caps works 90% of the time. The set turns itself of into a fault protection to keep from damaging more components internally. A few bucks a soldering iron some solder should do the trick.
Posted on Jun 30, 2010
I disagree with info provided, if screen of your LG lcd tv becomes green that means inverter board is working and lcd tv does not have convergence ICs.
Please unplug tv from ac wall socket for minute to get it reset, replug back in and turn it On and check its picture.
If still showing green screen then change input source with remote, if tv shows same green screen on all inputs that means its either lcd panel problem or digital signal processor got bad loacted on main board. Local tv repairman is needed to confirm and fix it.
Posted on Jul 23, 2010
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