Software for Lcd tv model TLCD-37fhda makes loud sound when put on/off.

You can't unless you can find a Source Button on the side of bottom of the set. Just buy a new replacement remote for that set.

$24!

https://www.google.com/search?q=telefunken+tlcd-37fhda+replacement+remote+control

https://www.fixya.com/support/r29872378-universal_remotes_no_facsimile_remote

Remote Control Codes For Telefunken TVs Codes For Universal Remotes

See if any of these work.

Telefunken Lcd in Johannesburg TV DVD Equipment Gumtree Classifieds South...

Web sites in South Africa with email addresses.

Try www.alibaba.com
Gopakumar Gopalan Google

http://www.alibaba.com.
Try the above link for the availability of the mother board.
Gopakumar Gopalan Google

Sounds like a main board fault. Contact any service technician. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/

Your TV has 2 settings that could potentially affect this volume. One, verify the Audio Out option is set to Fixed. This allows your surround to control the volume. Two, make sure Volume Offset for each input could be set low, verify that isn't the case. Hope this helps.

Check all strip wire connections to panel to T'Con board for any loose contact.

I have a solution . It is a file that needs to be uploaded via USB. Send me an email request and i will fwd it. Alternatively if someone has a host site to post it on for downloading, it is available. [email protected]

The 23" CRT set may have a high voltage breakdown in the flyback transformer or focus divider. Take the back off and operate the set in a dark room. Look for anything that has a blue glow around it or sparks flying when the pop occurs. I won't guarantee this will find your problem, but it is definitive if you see these!

I once had a set with these symptoms. I stopped the blue glow and arcing by covering the focus divider with epoxy. It worked for a couple of months before the divider literally broke apart.