The bed scanner works fine but the top scanner won't detect any paper or seems not to be detected by other scanning programs. Just nothing seems to trigger it at all.
Thanks for letting us know what Canon product you've got. The PIXMA MX432 is an older model which we have retired. While that means that Canon USA no longer offers direct support for it, your friends here in the Canon Community are welcome to offer suggestions!
You can also speak with a Canon Upgrade Program specialist to help you score a modern replacement that would meet your current needs at a discount. You can reach them weekdays and Saturdays at 1-866-443-8002.
