The hot key for a IOGEAR GCS634U KVM is scroll lock + scroll lock + port number + Enter. Or to put it another way, double scroll lock, then the number (1-4) of the KVM port you want to switch to, then press Enter.

I was using a for the first time in a while and could not remember the correct hot key combination to switch the video input. I was in a bit of a hurry and had to do a little digging before I found the answer. So after that I wanted to put this up in case I can save someone some time when searching for the key combination. Also, I'm pretty sure this hot key also works on the GCS632U as well as many other KVMs.

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I experienced a strange problem that ended up having a simple solution. A user called and reported that their keyboard was not responding. The mouse would move just fine, all Task Manager did not show anything unresponsive, but the computer would not respond to any keyboard commands including ctrl+alt+del. Thinking the keyboard probably went bad I grabbed a new keyboard, plugged it in and rebooted the computer. The keyboard worked for a minute then stopped responding again. My first thought was that maybe it was the port itself and not the keyboard so I moved the keyboard to a new port, but no dice, still not working. By this time I noticed a pattern, the keyboard would work just fine when entering credentials, but as soon as the profile loaded the keyboard became completely unresponsive. I logged on to the computer under my own account and as I suspected the keyboard was still working. I deleted the profile of the user who was logging in when the keyboard stopped responding. Boom! Now all of the sudden the keyboard worked just fine. Something in the profile was bad.

The solution is simple. All you have to do is Unlock the library in Backup Exec.
Here is how you do it:
In Backup Exec, go to the Devices tab.
Expand Robotic Libraries and locate the library.
Right click on the library, for me it was Quantum 1.
Then select Unlock and wait for the job to complete.
Once the Unlock job completes you should be able to release the doors on the magazine.

Resolution:
To resolve this issue you need to restore the file from backup. Go to the directory C:\BEST\Version4\MAS90\MAS_CAS\pocas and look for the file po6cas.old. Make a copy of the file and then rename the copy po6cas.soa. This should resolve the issue and allow you to access Receipt of Invoice and Receipt of Goods in the Purchase Order module.