Volume goes maximum - Bose Lifestyle V35 Theater System

Volume in modern systems are controlled by a single IC. If that goes, it makes the volume functions go wonky. The IC can be found by tracing the wires from the volume control, or following the circuit if it is mounted on a PC board.

your controlles on the tv set itself goes faulty simply spray some switch cleaner in buttons should sort you out

make sure there is enough power

If you raise the handset volume to the maximum level it will revert to the default after the call. To save the volume at current level stop at level 10 instead of 11 and the volume level should hold.

The volume level might be locked to 60. Refer its user manual for details about how to set it to full.

This type of calibartion is known as a logarithmic scale.
The numbers refer to decibels below the maximum output of the amplifier section of the reciever, or decibels of attenuation (making smaller/quieter).

Without going through logarithim theorey, the logarithim (base 10) of 1 is 0. So if 1 is the maximum output of the amp, as you turn the knob down from maximum you are adding more and more attentuation to the output (relative to maximum) and so the loudness of what you hear goes down, even though the number on the scale is going up !

Most peolpe associate decibels with sound levels, but anything can be measured in decibels, so long as there is soemthing to reference it against.

Because perhaps it is showing how far below the level of maximum, eg -20 is quieter than -10.

Post more info re no sound please

is easy just disable the AVS opcion en sound opcions

ITunes contains a volume leveling program that works with every recording in your library or you can select each one individually by going to the library, selecting get info with the right mouse button, select options, and change the volume with the control you see on the screen and press ok.

This sounds like there is a stuck button. With the TV off, try each of the panel buttons. You should feel the button engage. If not, that is the faulty one that should be replaced. Also, check to be sure that the plastic covering that extends to the actual switch inside the set is not broken causing a switch to be stuck on.
Keep us posted.
Dan