When TV working, push and hold 'CH-' button on the keypad and turn off the TV (standby mode). Push and hold 'CH+' button on the keypad (don't release 'CH-' button) and turn on the TV. Don't release these buttons until 'Factory Mode' dialog seem on the screen.
Download MTK.bin file and copy to USB main directory. Plug in USB Disk to USB port of TV. Before starting installation, get in the TV to DVD mode and press USB/CARD button. Wait until 'Update' dialog seem on the screen. After seem 'Update' dialog, press 'OK' button for starting installation. If screen saver comes to screen press 'OK' for skip.
If software installation has been successfully completed, DVD cover opens and closes.