If a upgrade fails and the headend don't boot into failsafe, or for some reason you need to boot in failsafe mode. Then you can force the system, to boot into Failsafe mode.
This function was added in version 188.8.131.52530.
- Set ID Switch to 6.
- Reboot TDX.
- Wait for the 4 front LEDS to blink red.
- Set ID Switch to 1.
- The 1st diode should slowly blink followed by fast blinking green.
- Wait for diode to turn solid green.
- Set ID Switch back to original position.
For a explanation on failsafe, please see this article : What Is Failsafe?