Sharp AL1631 Copier Intermittent Problem

Question

I have an intermittent problem with my copier. Sometimes when I turn it on the Ready Light above the Copy Button keeps blinking and there is a very faint clicking sound. The copier does not respond to the Copy Button. There is no error code in the display. It just sits there in this mode until I turn it off. Sometimes when I turn it on it works like it is supposed to.

 

I have recently replaced the toner cartridge but it did this before replacement too.