If that's what it is; clean the board off with hot water first, then rinse with acetone, Blow it off with an air gun, dry it completely with a blow dryer, and Spray it heavily on both sides with clearcoat.
It won't matter if it runs, just don't get it in any relays. (I don't think there is one)
Let it dry for a couple of days, and then put it in and see if it works.
The cleaning should get any oils or salts washed off, and then drying it out and coating it with laquer will seal off future leakage.
That's the way I fix almost any old, broken electronics; the rest need a soldering iron.
I bought a half dozen Geiger counters for $5 each, and sold them for $100 each, lol.
And If it doesn't work you can still get one on ebay.
Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.
"War Is Peace. Freedom Is Slavery. Ignorance Is Strength." - George Orwell.
Truth Isn't Truth. - Rudy Giuliani, 2018 Award winner, “Most Outrageous Diversion” by MSNBC for this quote