Hi.
If the TV stays in stand-by, with the LED light on, but
does not respond to remote, or to the buttons on the chassis, then that means that the
TV has gone in protect (safe) mode because an internal fault had been
detected.
Follow the basic troubleshooting on this article:
Why my TV does not start up, by disconnecting power cord and connected devices. The article is for rear projection TVs procedure is same on CRT, LCD and Plasma TVs. Disconnect power cord for at least 30 minutes, and test using different connected devices.
If that does not work, then a technician must test the TV and
replace the faulty component. In that case contact the support number
listed on the owner manual to get the TV repaired by a licensed
technician.
Regards.
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