Our HP 7410 Officejet All-In-One keeps malfunctioning. The display screen will go blank and the "On" button, " ! " button and "Auto Answer" button will blink.
Pressing "On" restarts it but this is happening several times a day. Any thoughts?

Sound most likely either a problem with the Fax or On button. I would call 1-800-HP Invent and have them walk you through some diagnostics. If its more than a year old, then e-mail them from their web site.