Question about Sylvania LC420SS8 LCD TV

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Remote sensor on tv not responding

I,have to turn on tv manually. change input manually,tv reception is ok. Volume cannot be controlled,it will lock in at full volume or drift back & forth,mostley full volume. If I use volume buttons on tv , it changes input (video 1 pc hdmi & so on) Once in a while setup screen will appear then disappear. I have changed batteries in the remote, I don`t believe this is the problem.When tv is first turned on the volume icon at bottom off screen will go from 0-60 and hang. since I cannot get remote to work with tv I can`t use mute button. The problem apppears to be in the tv itself?

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  • john jundt Feb 12, 2012

    In reply to your answer. what exactly is the s/w on the tv? Also the screen is flashing thru all the input modes constantly. I hear a humming sound for a few seconds then nothing. this seems to keep repeating itself every few seconds. Thanks for your reply.

  • john jundt Feb 13, 2012

    It appears that the volume is locked on at full volume, thus making a humming sound in the speakers about every 5 seconds or so. manual volume control has no effect.

  • john jundt Feb 14, 2012

    Problem solved. the problem was in the manual controls on tv. I bypassed the controls, the remote worked perfect. The tv is back up and running perfect minus the manual controls on the tv which was causing all the problems in the first place. Down the road I may replace the control board, but right now every thing is working fine. I just need to be sure and keep batteries on hand for remote. Again ,thank you for your reply. John

  • vhernandez1
    vhernandez1 Jul 07, 2012

    John, I have the identical problem - How did you bypass the manual controls?

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The problem is the s/w on the tv if you have some solder experience this is easy to fix just repalce the s/w

Posted on Feb 12, 2012

Testimonial: "Thanks to Jose Garcia for his reply to my problem. He was right on!!!!"

  • vhernandez1
    vhernandez1 Jul 07, 2012

    Jose, what is the s/w and where is it found?

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