I have a 1997 Sega The Lost World Jurassic Park that I brought home. I have not seen it in playing condition and I don't know if any needed mods have been done. All boards are original and do not appear to have any repairs done to them. I replaced the off board battery holder with nvram. No acid damage on the board. The diagnostics brought me to blown fuses on the I/O Power Driver Board at F-21, 50v Coils and F-22, 18v Controlled Lamps. The fuse clips are not burnt or corroded. About half of the playfield lamps look burnt and have what looks like black soot on the lamp holders. (see pictures below). The flippers work in test mode but none of the others coils.
I’m waiting for delivery of new slow blow fuses but wile I wait I thought I’d try to do some diagnosing. I have a multi-meter that I am still getting acquainted with and can solder.
I am going to check all the coils with the multi-meter but I’m not sure where to start with the lamps. Is there a correlation between the two blown fuses? Any advice as what to check?

Paul in Chesapeake OH

Here’s what half the lamps look like and a couple roll over switches

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C791992B-9C16-443B-BDE0-B92F4B2EF8BF (resized).jpeg

Bump

One more bump

Thanks slochar. That gives me a start. Fuses should be in the mail today.

The coils all tested good on the meter. My fuses arrived today and after changing them it is playing 100%, except for the snagger which was working in test mode. I’ll start going over it and will ask for help agin if I get stuck. I’ve played an hour now and it is not blowing fuses yet. Thanks for the help.