Can you try it like this
Download 4318 -> viewtopic.php?f=44&t=6510
At the bottom are the two methods described flash
Reflash Pohd to 4318 using the safe method
Flash methods Standard method
1: Turn off Ryan, red LED lights.
2: USB stick or an SD card [FAT 32 formatted] with the firmware .
The file name is always - install.img -
Setup> System> System update. [remote]
The firmware will now be flashed.Safe Mode Flash
1. Pull the plug
2: On / off button pressed.
3: Voltage at the Ryan set.
4: On / Off button only release when the blue LED starts blinking or loading on the TV is visible.
5: Waiting for the Ryan finished flashing.
6: reconfigure your settings (video/network etc).
7: Turn off Ryan> wait> turn back on the Ryan.