If that doesn't cure it, you might have to replace the board. Your profile doesn't state your location but in the UK you could try www.arcadewarehouse.com or e-bay.co.uk

If you are outside the UK I have a LOT of US contacts, drop me a mail for the list or you could try e-bay.com

Hope that helps!

Dan

Looking for ANY Sega Outrun arcade parts, mail me if you have any!!