BP Machine goes into Error mode. No repair info.

This is the second Omron BP machine I've own in about three years. The first one went into "E" mode and kept shutting itself down. This one I hoped would be different, but it's not. After about a year of once a week use it shows an "E" for error on its LCD screen, then resets itself and waits. I start it again and again I get the error message. There is no reset switch. It cost $90 or thereabouts and seems to me a waste of money.