What are common repairs on Bally and IGT slots?

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 Slot machines are rugged and dependable.  Many customers report their machines have worked for over 20 years without a problem. Most of the problems with slots made from the late 1980's to today are related to "SRAM" battery failure. On IGT and Bally slots the factory installed a new Lithium Ion battery that can last up to 20 years.  Most fail every 5 to 10 years and can cause an error code to show on your LED display.  The game is frozen and requires special equipment to re-start.  Simply soldering in a new battery will not work.  A technician must run a sometimes complex SRAM reset procedure just to get the game started then setup several game options to make everything work again.