I have a color TV (aiwa sx2150)
One day suddenly when tv is switched ON, no sound is observed.
Even "sound" option from setup menu is also gone.
Not a single sound function is accessible from remote or on TV buttons.
Type of Reception (PAL, NTSC etc.)started coming while tuning, which was not observed earlier any time.
in setup menu lenguage has started coming which was not there earlier.
In addition, total number of channels available is reduced from 210 to 99 only!
All other functions of Set is working OK.
Best thing to do with this set is to unplug it for at least 24 hours ,as it sounds like the microprocessor memory has gotten scrambled. By unplugging the set it should reset the micro. and let all the data flow as it was ment to. If this does not work after this, yoiu may have a locked up or bad microprocessor IC, or perhaps a reset issue with the reset circuit, or possably even a power supply issue.. These are all solid state repairs and should only be attempted by a trained tech. Good Luck and please let us know how you make out.