I have a Yamaha DX27, which has been put away in the closet for years. Today I pulled it out and turned it on and I get CHG RAM BATTERY! I know this means that I have to change the RAM battery, my question is, can I do this myself, or do I have to pay some guy $75 to remove a couple of screws and put in a $5 battery? Can I buy this battery at the local Radio Shack, or order it on-line?
