Hi, I'm Nathan.Sorry to hear that you're having trouble, but I'll do my best to help you. Please give me a few moments to review your details here.
This issue can come from a firmware glitch (hopefully) or a hardware failure (bad main board).
What you can try is to manually update the firmware, by downloading an update to your computer, and copying it over to the tv via a usb memory stick.
You can get the update file here: http://www.teac.com.au/engineering/LES5572F3D_5A30_1.rar
Download and extract that file, then save the fimrware file (MstarUpgrade.bin) to the root directory of a USB flash drive
Plug into usb2 on the tv
Turn on TV, at the same time keep tapping on remote’s volume(+) button until TV goes into firmware upgrading process.
Let me know if that helps.
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