ATEN ACS-1208AL - Manual (Page 55)

Firmware Upgrade Recovery
There are basically three conditions that call for firmware upgrade
recovery:
M When you invoke Firmware Upgrade Mode (see p. 5-2), but
decide not to proceed with the upgrade.
M When the Mainboard firmware upgrade fails.
M When the I/O firmware upgrade fails.
To perform a firmware upgrade recovery, do the following:
1. Slide the Firmware Upgrade Recovery Switch (see p. 1-9) to the
Recover position.
2. Power off and restart the the switch according to the instructions
given in the Powering Off and Restarting section (p. 2-7).
3. Slide the Firmware Upgrade Recovery Switch back to the Normal
position.
4. Repeat Step 2.
Note: If one of the slave units fails to upgrade successfully, unchain
it from the installation and perform the recovery and upgrade
operation independently. After it has been succussfully
upgraded, plug it back into the chain
2003-01-27
The Firmware Upgrade Utility
5-7