Hey ive always wanted to own a time crisis cabinet - and now that i have enough money, space and time to track one down i want to get one, well recently i found 1 on ebay in nice condition however when turning it on i believe it does a system check and displays this error:

"error code - dsp ram"

anyone know what that means? - i dont have the manual (and namco dont have it listed on their arcade site anymore) - so just woundering if any of you guys knew what the error is and how to fix it?