What happened?
The printer is displaying the message "Exposure screen that is currently connected has already been used on this printer. This screen was last used for approximately (counter) hours. If you do not want to use this screen: turn the printer off, replace the screen and turn the printer back on."
Error name: Old Expo Panel
Error code: #10548
This error is shown when the screen is changed, and the screen installed has already been used.
How to fix it?
If a used screen has been installed on purpose, the error can be skipped. Just note that the screen may have a lower like than a new screen.
Otherwise, change the screen into a new one.