When attempting to monitor a standard networked HP Black and White Laserjet printer the Printer Page Count (HP) Service fails. The reason it fails is it is an SNMP based service and the printer does not have the "Colour Page Count" OID is because it is B&W only. The N-Central service relies on subtracting the Colour page count from the total page count to get the B&W page count. The total page count OID exists (.126.96.36.199.188.8.131.52.184.108.40.206.1).
Suggest break out the existing "Printer Page Count (HP)" service into two:
• Printer Page Count (HP – B&W)
• Printer Page Count (HP – Colour)