900001 -Card Reader error
Open top of ATM
With ATM open standing on Right side of ATM (see pictures below for ease of access to card reader)
Insert and remove repeatedly card reader cleaner and look closely at card reader.
There is a spring loaded sensor that detects inserted card at rear of card reader
There are 9 brass or silver spring loaded pins on underside of card reader that read the chip.
Action: Unplug and re-seat cables. Reboot ATM (card reader will initialize during boot process may reset error)
Comments: Usually a piece of debris is obstructing reader
Card reader can easily be removed with a Phillips "star" head screwdriver for closer inspection
Most blockages can be cleared without removing card reader
Flashlight may be helpful
Alcohol soaked Cotton swap or microfiber cloth to clean contacts if you don’t have Chip reader cleaning cards.