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To do a factory reset, you must have its original remote control. A universal remote won't go. If you have its original remote control, and want to know more, check the site linked here. http://electronicshelponline.blogspot.com/ You have to enter its service mode option to make it a system reset. Never attempt to do it, if you are not sound in electronics.
Pull up previous posts, either by type in the Brand name to
your set in its search box, or view it in Mosaic / Timeslide / Flipcard option.
Have you tried unplugging the TV for 10 minutes? If not, give that a shot. This will allow the TV to reset itself to factory defaults (usually back into TV mode) so at least you can use your TV while you figure out the remote. There is also a possibility that the TV is stuck trying to read a remote that is lost (for some reason the firmware could be locked up) This would keep your Universal remote from working even with the correct codes. I hope this helps!
This seems like it would be more appropriate for the TV area as its not likely a remote issue. It sounds like you've accidentally changed source inputs to one that not there or the source you were on lost connection, if so check your cables if it HDMI unplug with everything off and reconnect.
I purchased a sylvanis lcd tv and it won't work with my comcast cable remote...I can't turn it on or off with it or turn up or down the volume. i've called my cable company 3 times and they can't seem to help me. Can you help?
3rd Party Universal Remote when trying to "scan" for correct codes inadvertently activates a diagnostics setting on the TV set.
The word "FACTORY" appears on the upper left quadrant of the screen in RED letters & suddenly all controls are "Locked Out." Television will not respond to button presses on original remote or on it's built-in-buttons on the side panel. All settings/options are "Locked Out" & the TV can only be shut OFF by physically unplugging it. Additionally, when the TV is plugged back in, it is still in the "ON" state & remains in "Locked Out" state.
The Solution: (thanks to a couple of hard-working Support Personnel at NESA)
Plug TV back into power source. Wait until it powers up and the word "FACTORY" is visible on-screen.
Press 6-4-8-3 on the TV's ORIGINAL IR remote device.
You are now in the diagnostic settings Sub-Menu, & the word "ADJUST" will be on the screen.
Press "MENU" on your TV's ORIGINAL IR remote device.
The TV is now back to it's former fully-functioning state.
I had a similar problem with a 1994 vintage Broksonic TV. I called the company (Hatzlachh Supply Inc. @ 800-333-9099). Broksonic TVs are not compatable with any universal remotes! You need an original factory remote. Remote for my set cost $20.00 plus shipping for a total of $24.95.