Hi all,
for the sake of troubleshooting can someone who has this issue please do the following:
1. Boot from the ESXi installation ISO
2. Press Alt-F12 on the keyboard as soon as possible to switch the screen to the VMkernel.log message display (This will work as soon as a message like "VMkernel initializing..." is displayed).
3. Wait until the keyboard stops working (on the log screen you can test if the keyboard is still working by scrolling left/right/up/down with the cursor keys)
4. Take a photo of the log screen and post it here.
Thanks
Andreas