My tv is working fine sound and input seem to work perfectly. After turning it on its fine but a few seconds later the display turns off indefinently. Sound still works fine after display turns off. Please help me, I know electronics but I'm clueless.
What is the brand and model of your TV? Try to turn it off first then unplug the power cable and all cables plugged in to the TV. After few seconds, plug the power cable back and other cables plugged in. Make sure that it's properly plugged in and not loose. Then turn the TV on and see if this make any changes.
How old is the TV? Also, does that occur with any other source of input to the TV (console, cable/sat TV box..DVD..etc)? If the answer is "yes", that could mean an internal electronic fault within the TV itself.