Firmware upgrade recovery, Upgrade” situation, see, Firmware upgrade – ATEN KN Series 32-Port KVM over IP Switch with Dual Power/LAN (1-Local + 4-Remote Access) User Manual
Page 217: Recovery
Advertising

Chapter 10. Maintenance
199
Firmware Upgrade Recovery
Should the switch’s main firmware upgrade procedure fail, and the switch
becomes unusable, the following firmware upgrade recovery procedure will
resolve the problem:
1. Power off the switch.
2. Press and hold the Reset Switch in (see
3. While holding the Reset Switch in, power the switch back on.
This causes the switch to use the original factory installed main firmware
version. Once the switch is operational, you can try upgrading the main
firmware again by logging on to the KVM over IP switch via web browser (see
Advertising