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Go to Settings on your mobile device Menu. Select Developer Options.
To the right at the top of the screen is an On/Off virtual switch. Move the slider to On. There will be a check-mark pop up if it is turned on.
To turn on the USB Debugging on a Samsung 4.2.2 or higher
1 Go to Settings on your mobile device Menu.
2 Click More Menu.
It is located in the upper right area of your screen.
3 Click on About Phone
4 Now, at the Android Build Number on your Samsung mobile device tap seven times.
This will activate the Developer Mode.
5 At Developer Mode select Developer Options.
6 Tap the USB Debugging.
It will turn on, and a check-mark should pop up to the right of USB Debugging.
Firmware corrupted. Do a firmware update. Contact any experienced service technician, of the authorized service centre to Insignia. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. Surf the site with patience. http://electronicshelponline.blogspot.com/ Pull up older posts there.
If your tv is under warranty, just send it to them for fix, otherwise you need to get into the "debug" or "maintanence" menu of the tv. Google the model number of the tv and things like "debug menu", "hidden menu" or "change horizontal scanning".
Your horizontal scanning option is set too far to the right of left.
You apparently have a high voltage arc.
Possibly the anode lead to your picture tube.
Also the flyback transformer could be arcing.
If you're not experience with tv repair, you need to have a tech check it for you. The circuits operate at very high voltage and if you get into it you can get a possibly fatal electrical shock.
Be careful !!!