My mute setting on the tv keeps going on and off on its own

Reset Sanyo Tv without remote
Keep pressing the {MUTE} button until the TV powers on with the Service Menu displayed. Use the {CH+} {CH-} buttons to select menus. Use the {VOL+} {VOL -} buttons to change settings. Some menus might have sub-addresses.
https://hardmasterreset.com/how-to-reset-sanyo-tv/

On some TCL Roku TV remotes, pressing Volume Up un-mutes the TV. Pressing Volume Down enough times will mute the TV. (A few models have a physical Mute button on the side of the TV.) If the TV speakers have been disabled, you'll need to go through the Settings or Options menu instead. (If the unit was used with a sound system, that would be common.)

For more specific information, please add a comment with the TV model. Usually the remote instructions are in the TV documentation. I can't find any TCL TV documentation that lists the 55R512 remote.

I hope this helps.

Cindy Wells

Hello
These are the service modes for Samsung. Check it with.
[1]
Turn on the TV on and select the input that you want to adjust.
# Turn the display off
In quick sequence on the remote press:
{MUTE} {1} {8} {2} {POWER} buttons.

# The TV will turn On with the Service Menu displayed.
ADJUSTMENT - TEST PATTERN - SET OPTION BYTE - FACTORY RESET

# Select the function and use the {VOL+} button to enter.
# Save settings and exit by pushing {MUTE} twice then {POWER}.
[2]
With the TV in standby, press the {INFO} {MENU} {MUTE} {POWER} buttons on the remote.
The TV will turn On with the Service Menu displayed.
Press the {POWER} button to exit the Service Menu.
[3]
With the TV in standby, press the
{DISPLAY} {P.STD} {MUTE} {POWER} on the remote.
The TV will turn On with the Service Menu displayed.
Use the {CH+} {CH -} buttons to select items.
Use the {VOL+} {VOL -} buttons to adjust.
Press the {POWER} button to exit the Service Menu

Without a model number I'll have to list several solutions.

Push Vol Down and Chan Up on the set at the same time, Then go to password screen and enter 0000.

Reduce Vol to minimum and hold Vol Down on set and Vol Down on remote.

Hold Vol Down on TV while pushing "TV" button on remote for 3 seconds.

With TV OFF, press and hold Vol Down on TV and "Clear" on remote for five (5) seconds.

Press "Menu" button on TV and "TV" button on remote for 3 seconds.
Some models use the Vol Down button on remote instead of "TV" button on remote.

With Remote go to Parental Menu and enter 2211 for code.

Go to parental Menu and press Mute, Display, Clear, Reset in sequence on the Remote.

Press "Menu" button on the set and Vol Down on Remote for 3 to 5 seconds.

With remote go to parental screen and press Chan Up and Vol Up on the front of set for 3 to 5 seconds.

Universal Remote Control Simple Setup

* Point it at a TV set and press the Mute/Power button. (Mute button if TV is already on, or Power button if the TV hasnt already been turned on)

* Keep pointing it at the TV until the TV turns on or muted, most TVs respond in about 5 seconds, the most is up to 20 seconds. (Other universal television remote you find in stores take minutes to program and enter long confusing codes)

* Once the TV is muted or turns on, simply let go of button and you have total control. You can use the remote as if you had the original remote, and responds instantly. ENJOY YOUR FREEDOM of choices with our remote!
Most remote controls require minutes of programming a universal remote code into each television while you read the confusing instruction manual.

Could be a contact piece of the MUTE button from your remote that is causing it.
Go out and Big Lots or Radio Shack to get a cheap universal remote control(big lots would be between $5-$10) Pick up the code for it,and when the tv happens again,your the OLD remote MUTE button to turn it back on and then put away this remote control and use the new universal remote control.
However,if the problem is coming from the manual MUTE button on the TV,you need a repair tech, to fix it!
solutiondoct

1. ENTERING TO SERVICE MODE
MUTE
S
(Service mode display)
3) While pressing the MUTE button,
press MENU button on TV set.
2) Press MUTE button
again to keep pressing.
1) Press MUTE button twice
on Remote Control.
2. DISPLAYING THE ADJUSTMENT MENU
1) Press MENU button on TV.
Adjustment mode
Press
Press
Service mode
Item
S Data
3. KEY FUNCTION IN THE SERVICE MODE
The following key entry during display of adjustment menu provides special functions.
Screen adjustment mode ON/OFF: TV (ANT)/VIDEO button (on TV)
Selection of the adjustment items : Channel s/t (on TV or Remote)
Change of the data value : Volume s/t (on TV or Remote)
Adjustment menu mode ON/OFF : MENU button (on TV)
Initialization of the memory (QA02) : RECALL+Channel button on TV (s)
Initialization of the self diagnostic data: RECALL+Channel button on TV (t)
“RCUT” selection : 1 button
“GCUT” selection : 2 button
“BCUT” selection : 3 button
“SCNT” selection : 4 button
“SCOL” selection : 5 button
“TNTC” selection : 6 button
Convergence adj : 7 button
Self diagnostic display : 9 button

Make sure the TV is on and:
1) Press and hold the Menu button on your TV SET
2) Press and hold the Menu button on your REMOTE CONTROL (at the same time)
3) Continue holding BOTH buttons down for 5 secconds or until the Service Menu pops up
4) Release the MENU button from your REMOTE CONTROL, then release the MENU button from the TV Set.
5) Press and hold ENTER (or OK) on the TV Set, then:
6) Press and hold MUTE on the REMOTE CONTROL (while still holding down the ENTER button on the TV SET
7) Holding both buttons down should lead to the Lamp Life Hours screen to pop up.
Release the MUTE button the REMOTE CONTROL, then release the ENTER (or OK) button on the TV Set.
9) Come back to this blog and post your HOURS on our site
10) Now press SELECT, then SELECT again to confirm the reset of the counter
** If the procedure above does not work swap steps 5 & 6.
** For a few special models (including 44SZ8D), you might have to change step 5 to:
5a) Press Enter on the TV Set to enter the Position Adjustment Screen
5b) Press and hold Enter on the TV Set (the TV should go back to the main Service Menu, continue holding Enter) and now also hold down the MUTE button on your REMOTE CONTROL. After about 5 seconds, your Lamp Life Counter should pop up.

Make sure the TV is on and:
1) Press and hold the Menu button on your TV SET
2) Press and hold the Menu button on your REMOTE CONTROL (at the same time)
3) Continue holding BOTH buttons down for 5 secconds or until the Service Menu pops up
4) Release the MENU button from your REMOTE CONTROL, then release the MENU button from the TV Set.
5) Press and hold ENTER (or OK) on the TV Set, then:
6) Press and hold MUTE on the REMOTE CONTROL (while still holding down the ENTER button on the TV SET
7) Holding both buttons down should lead to the Lamp Life Hours screen to pop up.
Release the MUTE button the REMOTE CONTROL, then release the ENTER (or OK) button on the TV Set.
9) To Check if it was a success
10) Now press SELECT, then SELECT again to confirm the reset of the counter
** If the procedure above does not work swap steps 5 & 6.
** For a few special models (including 44SZ8D), you might have to change step 5 to:
5a) Press Enter on the TV Set to enter the Position Adjustment Screen
5b) Press and hold Enter on the TV Set (the TV should go back to the main Service Menu, continue holding Enter) and now also hold down the MUTE button on your REMOTE CONTROL. After about 5 seconds, your Lamp Life Counter should pop up.

I know one code please try if it helps 1 press mute button once on remote control handset. 2 once again press &HOLD remote hand set mute button. 3 while keeping mute button pressed press menu button on tv set. good luck