No sound on my Sony Triniton - video has SAP on it

I think the source might have changed

There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts.
https://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been

Sap is for secondary audio, some TV broadcasts contain english as well as another language, ussually spanish. If it is mute it probably thinks there is something else there but there is nothing. TNT ussually has it depending on your TV provider and people will hit the sap button by mistake, It's funny to listen to them freak out thinking TNT has gone spanish.

you need to go into on screen menus and scroll to the video settings and adjust there

if there is no button for menu on front then you should write sony for a replacement remote as most aftermarket replacement remotes dont do the setting functions you are looking for

good luck - hope this helped you

Press MTS/SAP on the remote (under the number buttons) to go between the 3 options of STEREO or MONO or AUTO SAP. Not all channels will have SAP (secondary audio program). Selecting stereo should eliminate any secondary audio.

first check the speaker setting in the menu see if the speaker is selected ON. if the speaker is on then check the SAP function of the set. check this with the remote with the MTS button on the remote. keep hitting the button untill the word stereo appears.

If the sound is not heard during tuner (channel) but is when using an AV input (DVD) then it is likely the Second Audio Program (SAP) has been engaged. Some SONYs simply have a button on the remote to toggle through choices, SAP is used primarily for second language transmission of audio. Either move to a PBS station or some other channel that specifies SAP programmimg or turn the choice (MTS in some SONY menus) back to "main" by either a remote button or in the audio menu.

Good luck.

adjust the manual fine tune

I had somehow hit the SAP button! Turn it off, and you will get the use of your remote back! :) I don't know about your remote, but on mine I just had to hit SAP.

9 times out of 10 this is because something is not set right. On the remote look for a button labeled MTS. Press it while aiming at the TV and you should see the words MAIN, MONO and SAP as you continue pressing MTS. If the set is on SAP and you send in a signal without the Secondary Audio Program present, the set has no audio at all. This usually happens when someone inadvertantly hits the MTS button on the remote without realizing it. Also be sure to go into the menu, navigate to the audio page and make sure the speakers are set to ON.