SHARP Pocket Computer PC-1500A with Printer & AC Adapter in Original Case

I did not test entering a program and running it. I only tested it with MODE set to RUN where it operates as a calculator. All keys seem to work fine. .
The NEW0? had me confused until I looked it up and saw to enter N E W 0 ENTER on keypad to clear memory when had no battery installed.
I did not try battery power, only used the AC adapter both with the PC out of the case and in the case. When in the case, it worked fine if had the Printer switch in OFF position. If printer On, and tried a calculation, would get ERROR 78. The printer tape would advance at times but would not try to print (maybe because no ink?)
NO smoky or musty odors