I have a SI that isn't working. I just got this game home and don't know it's history. The monitor powers up , but there is a lot of strange characters displayed. $# and other symbols. I can make out a few words and there seems to be some changes in the characters. Almost like it is running through a routine of some sort. So any ideas on the root of the problem? Where should I start. I am new to video game repair. I do have some electronic back ground. I was going to start with cleaning all the board connectors and plugs and make sure that I have the proper DC voltages and that it is a clean DC. Again any help would be appreciated. Thanks.