Question about Philips 20PT643R 20" TV

1 Answer

Our Tv will turn on by itself, at full volume and I can't change the channel. The remote doesn't work at all, the only way to shut it off at all is to unplug it from the wall. It's only about 4 years old can it be repaired?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,175 Answers

If someone has ever sprayed glass cleaner or the like on the screen , it's possible that liquid got down into the control button board.
It's fixable but it may be cheaper to buy another new.

Posted on Jan 27, 2009


2 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

  • 106 Answers

SOURCE: RCA TV changes channel and volume, and shuts off by itself.

ok its not a cap problem.. memory ic problem...u have to replace memory ic the nos are i think 24c16 or24c08
u have to buy the memory by giving ur model no of the tv

Posted on Mar 06, 2010

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Bush lcd42f1080p100hz remote will not turn tv on

I had come home about a week ago and pushed the power button from my remote but my tv did not respond. So I just went to the front panel and pushed power but once the tv turned on, the volume was on full blast! I used the front panel volume decrease to get the volume down, but when I stopped pushing the button, the tv increased its volume to full blast again by itself! Naturally I just turned the tv off for a few moments. I tried the remote again, no response again, so I used the panel power button. The tv volume was still full blast when it turned on but after I decreased the volume it stayed this time. The picture is and has been perfectly fine and the tv was working fine. The next day the problem started all over and now once we turned it off from frustration of having to manually use the panel to change channels, it now will not turn on at all. I have changed batteries from my remote, reprogrammed my remote, pushed system reset several times, unplugged it for a while, bought a new surge charge, and even held the menu and device panel buttons for 10 sec and tried to turn the t.v. on again! What other options do I have or what may be the issue at hand and possible parts that may need to be replaced?? Thanks!!

Nov 02, 2012 | Televison & Video

1 Answer

I have an 1998 rca premiere and it keeps changing channels by itself and turning itself up

You need to change the picture-size by using the TV remote and or cable remote.
On the remote look for P-Size, Zoom, Sreen size or Ratio.

Nov 10, 2011 | RCA P52937 52" Rear Projection Television

2 Answers

I bought a Toshiba TV with remote CT90326 from a friend who had a different service (satellite) and I have cable and the remote works to turn on the TV , punch in specific channels, and to change volume,...

Any television remote will give full access to the television functions. The remote must be specific to that television. Google
make model replacement remote
There are original ones on ebay, plus companies that sell remotes that are an exact copy. The CT90326 may be for another Toshiba model, or of course it may be faulty.

Then we have the remote on the cable or satellite unit. That gives full command of the unit functions, but BASIC control of the television, normally On, Off, Channel Up and down to allow access to DVD or similar and Volume Up and Down. Everything else is done from the TV Remote.

To get the cable remote to make that happen, you Google
Toshiba Remote Codes
and run through them all until a selected code allows you to switch the television on and off.

Sep 25, 2017 | Toshiba Televison & Video

1 Answer

Mitsubishi TV Channel Tuning/Remote Problems

To restore full functionality to your set you must replace the remote that came with set. Universals only control the most basic of functions.

Apr 27, 2017 | Televison & Video

1 Answer

Powers on by itself

TV worked FINE for the past 2 yrs---this morning we woke up and the screen is totally BLACK! No sound..nothing. REmote doesn't do anything to the TV. Red light says ON unless we unplug it. Remote won't turn off the TV.
Any advise? Picture tube??
Worked great w/out any problems until we woke up today!


Jun 01, 2008 | RCA 32V420T 32" TV

1 Answer

"snow" screen, full volume, remotes don"t work

good day
due to the long time the buttons were not used, they tend to get stuck and this causes channels eighter to stay in one station or continou scanning. it could be resolved by spraying WD40 on the buttons and press it many times then dry it before operating the unit.


Mar 25, 2008 | Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer


re- program...................................................

Jan 25, 2008 | RCA F32450 32" TV

2 Answers


is this tv the same model/brand? far be it from me to claim poltergeists are at work, but who knows... the very first thing i would do in diagnosing this issue is to grab some electrical tape and aluminum foil, tape a patch over the ir receiver for the remote, this should be a shiny piece of black plastic somewhere on the front of the tv, some are marked, some are not.. if you have it, aluminum duct tape works great for this purpose.

to me, it seems like someone is messing with you using a remote, tv-b-gone, or similar product like a keychain universal remote.. if the tape over the ir sensor fixes the issue, i would look at roommates, kids, neighbors, or possible interference from other ir or light sources..

possible culprits would be:
universal remotes
dirty remotes that keep sending a signal with nobody using it
laptops or cellphones with an irda port
palm devices such as palm, clie, etc that have irda
intermittent strobes (emergency vehicles, bad ballast in a light fixture, etc)

i can't guarantee this is your problem, but it seems like it since this is your second tv with the same or similar problem... as a sidenote, the sony clie came with a universal remote program, i caused much chaos in my local video stores by shutting down their video wall while browsing.

Nov 16, 2007 | Vizio VX32L Television

Not finding what you are looking for?
Philips 20PT643R 20" TV Logo

Related Topics:

81 people viewed this question

Ask a Question

Usually answered in minutes!

Top Philips Televison & Video Experts

The Knight
The Knight

Level 3 Expert

74999 Answers

matt martin
matt martin

Level 3 Expert

1213 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a Philips Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides