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the fuse on the motherboard is there any more fuses to look at for repair?

do you have a diagram for the motherboard -- need to check the fuse to see if it has blown--have a royal er145
christine, June 2011
Sorry, this is an old model and there is not much information around. It is very unlikely to have a blown fuse. If it is dead, a bad battery is more likely.
C-tech has a programming manual for it which may help:

http://the-checkout-tech.com/manuals/cashregisters/Royal_ER-145_operating_and_programming_manual.html

Registerman, June 2011
link Click here to see other fixes for Royal ER145.