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I have a Motorola RU4160BKN9BA that changes from channel to channel without anyone touching it. It will do so in the middle of a conversation or sitting on the desk by itself. Any ideas?

Posted by John D on

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4 Related Answers

Jaime Hernandez

  • 2337 Answers

SOURCE: Display continueuly changes

Unplug your device for about 30 minutes to let the circuitry reset itself.
If it works normally after that, it means a hardware part(s) is overheating inside, more likely a power supply is starting to fail and does not provide the proper voltages for the microprocessor.

Posted on Jul 04, 2008

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Anonymous

  • 3 Answers

SOURCE: tv channel will not change and volume keeps increasing without to

Most likely you have a defecvtive volume up switch. Unsolder it from the board, and see if problem goes away. Very common problem. Since only one function can work at a time, none of the others will work until you "release" that switch

Posted on Dec 01, 2008

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Sonny Berry

  • 8617 Answers

SOURCE: I love my RCA...excpect that

Thats the classis sign of a failed small signal board. You can get replacement signal boards from www.tvrepairworld.com

Posted on Sep 29, 2010

SD Tech

SD Tech

  • 14553 Answers

SOURCE: My Hitachi 57F59 was scrolling thru the channels without anyone touching the remote - I unplugged it for two days and now it keeps flashing the

Keyboard issues and answers:A problem that is more common than most people think is an issue with buttons on thecontrol keyboards of modern TV sets.
Recently for whatever reason I have seen more questions about this so I have composed this answer and solution for these kinds of problems.
It can be any button on the set-channel up/down or volume up down-you name it.
The symptoms are the same: channel will scan up or down andwill not stop-remote control has no effect on this---It can be channel, volume,or even input or menu if the set has those up front or on the side of the set.
All these push controls have something in common-beneatheach is a tiny momentary push switch-when pushed with the plastic button itperforms a specific task (vol up or down etc.)

What happens is the afflicted switch beneath the plasticbutton is bad-when released it is supposed to stop its function but does not.
Keyboard or button controlled features have PRIORITYover the remote control, hence the remote will not stop this fromhappening.

Both the remote and thekeyboard go to the microprocessor in the set but keyboard is first in line.
How to resolve this issue?
Someone needs to get at the tiny pc board with the buttonsand locate the one associated with the issue (ie sound or channel etc) andunsolder that switch from the board-usually just two pins (may be more formounting only purposes) and then see if set does not have the issue with switchout of the circuit.
For the TECH minded with the board out test here theswitches with a ohm meter set to high resistance-any reading with button notpressed means a bad switch-seen ones that read 5,000 plus ohms-it may benecessary to unsolder more than one switch to locate the offender here but an open reading with switch not pressed is therule.
I have taken the time to compose this answer as some do notunderstand what is happening in these types of situations---No magic wand orsmoke and mirrors here-have to disable the offending switch to know.
The beauty (in my view) of this kind of problem is if found, you really do not have to replace anypart-just operate the set with the remote with one button that no longerfunctions on the set itself-who could ask for more?

SD TECH

Posted on Jun 01, 2012

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