Won't hold date in memory
Try checking the voltage on the memory battery. It is a BR2/3A lithium clipped into the main board. You need to open the case. You will need to remove the paper door assy to get to one of the case screws. The paper door is held in place with a spring loaded hinge pin. Pop that out with a small screwdriver and the paper door assembly will lift right out.
Cheers, Jim