[DonDavis]

If you put an ohm meter on the leads from one trace to another, you may be going through the components. Hard to tell what readings you may get. I would desolder the work he did and clean all traces using as little heat and time as possible. Re-insert components and use solder SPARINGLY! I know it's fun to say "bigger the blob..." but that just means you are not heating it correctly/sufficiently and staying on the component too long. As you know, heat is the enemy for components.

If no joy, put on the hat, call the manufacturer and use your coboy voice "Hey Darlin', muh cawfee pot done took a dirt nap me. Whut does a fella gotta do ta git a replacement board?"