Channel 1 will not mute when button is pressed. all other channels are fine

1 manually turn on device(TV, VCR,ect. Be sure batteries are good in remote.
2 press and hold the CODE SEARCH button until the red indicator stays on,then release Code search button.
3 press and release mode button (TV, VCR, ect) the red indicator blinks,then stays lit.
4 press channel up( up to 300 times) until device changes channel. The red indicator blinks,then stays lit.
5 Press the Mute button release to lock in code
Tips if you go pass the code use channeldown when channel change hit the mute button and release it to install code.

Depending on which type of chat session you are connected to... everyone needs to be in the same chat menu. Sometimes when switching from game chat to party chat you might still be stuck in game chat while others are in private chat or visa versa.

To talk to only players in your game: Press the Guide button, then select Party, Party Options, Chat Channel, and Game Chat.

To talk to only members of the party: Press the Guide button, then select Party, Party Options, Chat Channel, and Party Chat.

To mute an individual: Press the Guide button, then select Party, the player's gamertag, and Mute.

It is a possibility that you are not in the same chat session with your friends. they might be in a party chat with others while you are in game chat. (note you can only have a max of 8 people in one party chat) Or you might still be in a party chat (that everyone else has left) and they are in game chat.
To... Do this... Talk to only players in your game Press the Guide button, then select Party, Party Options, Chat Channel, and Game Chat. Talk to only members of the party Press the Guide button, then select Party, Party Options, Chat Channel, and Party Chat. Mute an individual Press the Guide button, then select Party, the player's gamertag, and Mute.
To... Do this... Talk to only players in your game Press the Guide button, then select Party, Party Options, Chat Channel, and Game Chat. Talk to only members of the party Press the Guide button, then select Party, Party Options, Chat Channel, and Party Chat. Mute an individual Press the Guide button, then select Party, the player's gamertag, and Mute.
To... Do this... Talk to only players in your game Press the Guide button, then select Party, Party Options, Chat Channel, and Game Chat. Talk to only members of the party Press the Guide button, then select Party, Party Options, Chat Channel, and Party Chat. Mute an individual Press the Guide button, then select Party, the player's gamertag, and Mute.
Key Points

• Online safety and privacy settings may block access to Xbox LIVE chat.
• To use Xbox LIVE parties and chat, Voice and Text must bet set to Friends or Everyone

To... Do this... Talk to only players in your game Press the Guide button, then select Party, Party Options, Chat Channel, and Game Chat. Talk to only members of the party Press the Guide button, then select Party, Party Options, Chat Channel, and Party Chat. Mute an individual Press the Guide button, then select Party, the player's gamertag, and Mute. To... Do this... Talk to only players in your game Press the Guide button, then select Party, Party Options, Chat Channel, and Game Chat. Talk to only members of the party Press the Guide button, then select Party, Party Options, Chat Channel, and Party Chat. Mute an individual Press the Guide button, then select Party, the player's gamertag, and Mute.

Here's how to scan for TV codes on your DIRECTV remote

1.Make sure your TV is turned on.

2.Slide the mode switch at top of remote to "TV".

3.Press and hold the MUTE button. This is located above the number 1 button.

4.While still holding down MUTE, press and hold the SELECT button until green light at the top of the remote flashes twice.

5.Then enter 991, the green light on remote should flash twice.

5b. Press 1 again (it will flash twice again), then you press the power on button at the very top right.

6.Point remote at TV and press CHANNEL UP button. Tap the CHANNEL UP button repeatedly until the TV powers off.

*If you hit channel up very fast, you risk going past the code. Pressing channel down will back it up. I alway hit channel up very fast till the tv turns off, then back it up slowly till it comes back on.

7.When the TV powers off, press and release the SELECT button.

*Note: If the green light flashes three times before TV responds, then all codes have been cycled through. Our remote controls are guaranteed to program to your DIRECTV receiver, however your TV may not be compatible with our remote control.

1. Manually turn on the device (TV, VCR, etc.) to be
controlled.
2. Press and hold the CODE SEARCH button until the
red indicator stays on, then release the CODE
SEARCH button.
3. Press and quickly release the desired mode button
(TV, VCR, etc.). The red indicator blinks off once.
4. Press the CHANNEL UP button repeatedly (up to
300 times) until the device to be controlled changes
channel. The red indicator blinks off with each
button press. If you accidentally overshoot the
code required, press the CHANNEL DOWN button
to backtrack through the library until the device
changes channel. Pressing CHANNEL UP changes
direction to forward again.
5. Press and release MUTE to install the code.

1. Manually turn on the device (TV, VCR, etc.) to be
controlled.
2. Press and hold the CODE SEARCH button until the
red indicator stays on, then release the CODE
SEARCH button.
3. Press and quickly release the desired mode button
(TV, VCR, etc.). The red indicator blinks off once.
4. Press the CHANNEL UP button repeatedly (up to
300 times) until the device to be controlled changes
channel. The red indicator blinks off with each
button press. If you accidentally overshoot the
code required, press the CHANNEL DOWN button
to backtrack through the library until the device
changes channel. Pressing CHANNEL UP changes
direction to forward again.
5. Press and release MUTE to install the code.

I assume the control panel on the tv still works correctly? If so i would think you have a remote problem. If thats the case let me know I will send you a link to instructions to repair your remote.
lone99star

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/jason_77a19afa8d604dee

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

Programming with Code Search

1. Manually turn on the device (TV, VCR, etc.) to be controlled.

2. Press and hold Code Search button until the red indicator stays on. Release the Code Search button.

3. Press and release the desired mode button (TV, VCR, etc.). The red indicator blink, then stays lit.

4. Press the Channel Up button repeatedly (up to 300 times) until the device could be controlled changes channel. The red indicator blinks, then stays lit. If you accidentally overshoot the code required, press the Channel Down button to backtrack through the library until the device changes channel. Pressing Channel Up changes direction to forward again. Press and release the Mute button to install the code.

Hope this helps :)

You have to push and hold down TV and Mute button (for 2 seconds at the same time), then release them at the same time, then push channel up until the TV turns off.  Be patient and continue channel up until the TV turns off.  When it turns off, then push TV again to lock the code.

You were doing fine, but missed to push channel up to fine the code.

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