Volume control doesn't work on Grundig t 55-640

Hello! I'd be happy to help you.
To remove the key lock from your Grundig TV model GU26DVD without a remote control, you can try the following steps:

1. Turn on the TV using the power button on the TV itself.
2. Press and hold the MENU button on the TV for several seconds until the menu appears.
3. Use the volume up/down buttons to navigate to the "Lock" or "Child Lock" option and press the MENU button to select it.
4. Enter the four-digit password using the number buttons on the TV. If you don't know the password, you may be able to find it in the TV manual or by contacting the manufacturer.
5. Navigate to the "Off" option and press the MENU button to select it.
6. Press the MENU button to exit the menu.

If the above steps don't work or you don't have the manual to find the password, you may need to contact the manufacturer or a professional technician for assistance.

Hello
Sky remote codes for Grundig are:

563 582 515 098 584 219 104 233 223 065 471

Sky+ Remote Control Unit Programming Procedure Follow the steps below

1. Select any channel on the TV.

2. Point your Sky+ remote control away from the TV and press the tv button.

3. Press and hold down the Select and red buttons simultaneously on the Sky+ remote control until the red light at the top of the Sky+ remote control flashes twice.

4. Input the 3 digit number from the Sky+ remote control codes then press the Select button. The red light at the top of the Sky+ remote control should flash twice.

5. Point the Sky+ remote control at the TV and try the volume button.

If this works try the other TV functions.

If these work then the correct code has been selected.

It's important to note that not all TV functions will be supported by the Sky+ remote control e.g. Picture in Picture.
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If all functions do not work correctly, then repeat steps 1 - 3 and work through all the relevant 3 digit numbers from the Sky+ remote control codes, until you find the code which supports all or as many of the TV functions as possible.
Please note: In order to operate both your TV and Sky+ with your Sky+ remote control, you will be required to switch modes e.g. to switch on your TV from stand-by, you would need to press "TV" followed by the "Stand-by" button. Then to change channel on your Sky+ you would need to press the "Sky" button followed by the "TV guide" button.

The remote's volume keys are "punch-thru" keys, meaning they'll work for the TV for which the
remote is programmed no matter what mode the remote is in. It seems your remote is not
in "TV mode," but the punch-thru keys (volume UP/DOWN) are working.
The Solution: change the remote from "AUX mode" or "DVD Mode" back to "TV mode", by
pressing the "TV" button at the top of the remote.

Either that, or your remote keypad has failed with the exception of the Volume UP/DOWN keys....
Also, your batteries may be failing, since it takes a tiny amount of energy to light
the IR (infra-red) LEDs at the front of the remote to change the volume.
Is your remote a "multi-function" remote?
Could help more if you could post your Samsung remote model number, since
www.samsungparts.com lists 37 pages of TV remotes (at 10 models per page).

GO to All TV Service Menu Code to browse olmost tv factory mode.
You can find lot of service code for tvs, DVDs, Monitor and many more.

The code you have to input is 527. Press and hold select and red on the sky remote until the red light flashes twice, then input 527 and press select. Now try the volume control on the sky remote. Should work. Hope this helps.

just press the button on Tv Cabinet Volume+channel and get power off and then power on from the tv cabinet raise the volume and off the power again and then power on normally u r prob will be solve

First reset it to factory default: While pressing [VOLUME ( - )] button on the TV, press [MENU] button of the remote control 2 seconds, the self check screen will appear, then Unplug Power to reset.
If doesn’t work, update the software, if still not work, let me know.

To set up the volume control on your virgin remote control, to be able to change the TV volume, please follow the instructions below.

1. Using the table below find your make of TV and the code which matches it.
2. Press and hold down Volume + and mute on your remote control at the same time for at least three seconds, until the green light in the top right-hand corner of your remote control flashes twice.
3. Release the buttons and enter the first four digit code from the table below. (You must do this within ten seconds).
4. As you enter the first three digits the green light on your remote control will give a short blink.
5. As you enter the fourth digit, the green light will flash twice to confirm that the volume is set.
If setting the volume is not successful, please repeat the above steps with the second or third codes from the table below.

TV Codes
Akai 0236, 0544, 0630
Alba 0037, 0065, 0246
Amstrad 0205, 0440, 0065
Bush 0246, 0263, 0377
Decca 0064, 0100, 0544
Ferguson 0101, 0363, 0221
Fidelity 0244, 0221, 0460
Finlandia 0374, 0387, 0236
Goodmans 0065, 0064, 0100
Granada 0379, 0387, 0391
Grundig 0563, 0582, 0515
Hinari 0037, 0064, 0065
Hitachi 0253, 0384, 0377
JVC 0681, 0081, 0122
Matsui 0263, 0205, 0037
Mitsubishi 0136, 0382, 0064
NEI 0065, 0365, 0459
Nokia 0508, 0501, 0576
Panasonic 0678, 0254, 0278
Philips 0584, 0065, 0040
Saisho 0039, 0205, 0263
Samsung 0065, 0584, 0037
Sanyo 0236, 0073, 0100
Sharp 0121, 0064, 0065
Sony 0533, 0038, 0039
Tatung 0065, 0100, 0544
Thomson 0363, 0653, 0137
Toshiba 0536, 0063, 0271

If I have not listed your make of TV in the table above,
1. Press to go to the Home Screen.
2. Choose Telewest Services.
3. Choose Technical Assistance.
4. Choose TV Control Codes.
5. A full list of TV brand codes will appear.
If the volume control is still not working after trying all the codes for your TV model, or your TV model is not listed, then your TV is not compatible with our remote control and you will need to use your TV remote to control the volume as normal.
You can also use your TV remote control to adjust the volume in the normal way. Good Luck

Swich off tv from main swicher. Press i on remote control and hold it. Swicn on the tv from main swicher. On the screen should appear a service menu. Under decoder level with volume button from remote change from off to on. The same is with hotel mode for volume control. Exit the service menu by presing i on remote control and have a nice day!

ok please open the remote then clean it with pencil eraser.