Head over to the 68kmla.org forum where the gurus are, and state the precise symptoms. Also, make sure you've replaced the PRAM battery as they will leak at som

Head over to the 68kmla.org forum where the gurus are, and state the precise symptoms. Also, make sure you've replaced the PRAM battery as they will leak at some point and damage the mainboard, usually beyond repair. Same for old leaky capacitors, which leak their corrosive contents onto the mainboard, causing all kinds of nasty and hard to diagnose problems.