PLANET KVM-203 - Manual (Page 6)

Note
1. Auto-Scan interval will take 10 seconds and followed with one
beep and the KVM switch remains on one port for 10 seconds
before switching to the next. Please be notice that the mouse
and keyboard control will be restricted in the Auto Scan mode.
2. Escape from Hot Key Mode, if you don’t press any buttons after
4 or 5 seconds.
3. This KVM Switch will not detect whether a computer is on or
off if the “Power On” function is set in the BIOS. Meaning,
when you switch to the computer that is turned off, there will be
nothing displayed on the monitor.