Hi,
Based on your description above, I will try to help.
# When your printer power doesn't functioned well then the red paper light won't lit. The question is when you plug the power to the AC outlet, does the power button lamp blink?
# When the printer plug on the AC outlet and your printer paper feed light on (when this is the case) these could be:
** Paper feed censored malfunctioned
** Decoder malfunctioned
** Your e-prompt chip need to be replaced.
** etc.
# Hope these will help you to detect your printer problems.