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Just go to Devices and Printers from Control Panel, Right click on your Printer and click on See Whats Printing or Print Status, Once you click on it the Printer Spool Window would appear there click on File and make sure use Printer Off line is not checked. If its not checked and you have the same issue its an issue with the driver the Printer has to be reinstalled.
switch off...hold down 0 + 8 keys,
switch on holding keys for 5-10 secs then let go.
punch in 251 then print key should show pm set figure,punch in say / add 20,000 on to figure then press set in the display.
switch off then on should have cancelled prevent maintenance.