My main menu is blinking off and on and i cant stop it

Light flasher will not stop flashing.

I had the same problem with my FishElite 642, a reset cured it.
The reset procedure is here http://www.eaglenav.com/Support/Troubleshooting-Guide/Reset-Procedures/

Go to the menu and click on the settings>messages>activate the option called blocked messages.

its a problem with the monitor and press and hold the menu button on the monitor and the problem will be resolved

Most likely bad caps on the dm board.

This unit has component failure on the main board and should be taken to a service center for service.You may need to replace the main board or it may be a simple component failure. If you are out of warranty and need help. Try to find a experienced electronic technician with tools and work space to open you television. Have him check for faulty components on all the boards and check the solder joints for bad connections.You may have to replace the main board.This product may be found sometimes on e-bay by the model of the television and the part number of the board. Insignia customer service number is 1-877-467-4289 and the number for parts is 1-888-237-8289.Hope this helps you with your problem.

is your back light constantly on when you are not changing channels.if so replace the main board. can you see a menu if you hit the menu button ? that is generated by your main board..... replacing the t-con will only correct vertical lines in the pic.

The blinking LED also indicates a missed call. From the main stand-by screen; Press the up arrow (which says CID short for Caller Identification), then menu. You should now be in the call list. Scroll through the list making sure to view all calls with the word NEW next to them. You can also press menu in the call list then choose "delete all" to erase the entire list.

replace power supply board parts avail at www.rich's playstationparts.com

Your set is in DEMO mode......consult owners manual....
Usually in menu pages.........Oh, switch back to English...
select Lingua to change.........T.