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Thursday 24 May 2018 at 19:26
Quoted from stangbat:Now comes the fun part. You need to find the reason for the 2.5A SB fuse blowing. Time to study Pinwiki, other threads, and other repair sites. You need to do the bullet proofing steps such as replacing the 40 pin header and sockets.
Look for a shorted transistor on the drive...
Source: http://pinside.com/pinball/forum/topic/74ls139-getting-cooked-thoughts-as-to-why#post-4416003