Question about Symphonic ST420FF 20" TV

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Volume control If I attempt to turn the volume down on my tv it automatically mutes! It is stuck at a high minimum of volume. Please advise!

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Re: volume control - Symphonic ST420FF 20" TV Standard (CRT) Televisions

Check the volume switch

Posted on Mar 18, 2008

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I can get a great picture but no sound

Check volume level or for "MUTE" selected on BOTH the TV volume control and on any cable box volume control. If one is set to minimum, turning the other up all the way won't do anything.

Apr 23, 2015 | Standard (CRT) Televisions

1 Answer

Ok so 1 of my kidos has the RCA 20F420T tv, and i guess there is no headphone jack hole, so i went and bought adapter that plugs into the av jacks, still doesnt work can you please help!!!

Without knowing the specifics on this adapter - I can provide only provide some clues as to how this works.

Basically, the A/V jacks on a TV has a "fixed" audio output level - this means that the sound levels on the A/V jacks is NOT controlled by the volume control of the TV itself. You should be able to set the TV volume to minimum and then use the adapter's volume control to make the earphone / headphone sound louder and softer. Your TV however, may have a setting in the menu that can change the audio from "fixed" to "variable". If set to "variable", when turning the volume down for the TV's built in speakers will also turn the volume down on the A/V jacks as well. You do not want this to work like that as the sound in the headphones and the TV speakers will be same - instead of the TV speakers being off and the headphones on.

I hope this helps and good luck! Please rate my reply. Thanks!

May 26, 2011 | RCA 20F420T 20" TV

1 Answer

I do not have a credit card. I have connected my wireless headset to the TVs audio out on the back and it works great. My problem is I can not mute the TV speakers, so the sound is comming from both...

Try just turning the volume down on the TV. The audio power to the red/white output jacks should be the same at any TV volume since it is expecting you to control the volume with an audio receiver or other amplifier.

Good luck.

Please rate me


May 05, 2011 | Curtis-Mathis Standard (CRT) Televisions

1 Answer

The volume of my tv is automatically going down

what type/make of tv is this - check if the front keypad vol- on the TV is not stuck on

Oct 18, 2009 | Standard (CRT) Televisions

1 Answer


confirm that volume contro plus (+) button does not stuck inside.
try to apply good contact cleaner in volme button and press it many times until it released.

Mar 08, 2008 | Akai CF2791 27" TV

1 Answer

Locked out TV Screen by accident

If you forgot your password for this feature, press the following buttons on the remote, one at a time. (Note: You must be in the password entry screen) Press, Mute, Display,Clear and Reset, this unlocks parental controls and you can now re-enter a new password.
Press and hold Menu on the TV AND volume down on the remote for 3 seconds. Nothing will appear on the screen, and the Parental Controls will unlock, and you can re-enter a new password with the LOCK PARENTAL CONTROLS

Jan 25, 2008 | RCA TruFlat 27F520T 27" TV

1 Answer

Sound Stuck on High

change the audio ic it has a short within.this will restore your set to normal dont forget to make checks in that same circuit as there might be resistors,diodes or caps that had contributed to the failure of the ic.good luck.

Aug 03, 2007 | Toshiba 19A25 19" TV

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Sony 36' TV Volume Goes up on own/Stuck on Video 2

There's a setting in the menu. I think it's called "smart audio". It's supposed to adjust the volume automatically for commercials. But I don't think it works that well. Give that a try.

Jan 09, 2007 | Sony FD Trinitron WEGA KD-36FS130 36" TV

1 Answer


Someone push the volume up button too hard and is stuck,this also has the micro(brain) confused,all this happen before you fund out your remote would not work.

Sep 03, 2006 | Sony FD Trinitron WEGA KV-32FV300 32" TV

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