Hi

My Riso copier doesn't print anymore. It remain unused in a corner over a year ago. Now the machine print blank paper, there is no ink on it. The scanner scan the original fine, but when print there is no image. I removed the drum and test it in another machine of the same type, and it work fine in that machine with nice printing. But when I reinstall it in the original machine, there is no image again and again. There is no error code on the dispaly. Please help.

Regards