Fujitsu has a service menu with limited function.
Hold {ENTER} on the remote until you see a menu come up like this:
Monitor Mode A
Monitor Mode B
Extend Adjust
Using the remote keys, select a Mode and press enter to access it.
Monitor Mode A
Fan Settings
Temperature Reading
Hours Meter
To determine total hours, add RGB and video for the total hours on the plasma (each number represents hours on that selected input): disregard total hours (that is number of hours plasma is plugged in.
Monitor Mode B
Shows error codes, if any.
Extend Adjust
Fan Mode
AGC
V Screen Orbiter
RS232 Baud Rate
Default (CAUTION: pressing default will reset the hours counter to zero).
Press menu to toggle from one menu to another.