I purchased the Sony PCM D50 recorder in 2009 and first used it on a trip through Blues country in Louisiana with a reporter. I stored it away after a year. I pulled it out of my electronics box this week (to start recording my family's history) and have found that the power does not come on. I tried all actions on the trouble shooting list: I changed the AA batteries, turned the hold button to "off" and while I do not have the original DC Input, I have a substitute. Nothing works. I remember this was an expensive purchase and the sound quality was excellent. It's a discontinued model that I want to save. Any suggestions? Much appreciated.