probably just have to add some jumpers to fix the broken traces.
you got lots of rosin on there as well. not an issue but i'd probably clean it off with isopropyl alcohol to prevent corrosion down the line.
do you have a multimeter? continuity tester? use it to diagnose where the broken trace is.
looks like it's the whole bottom row, is that correct? start around the bottom left switch. one leg should connect to the column above, the other should go through the diode and to the next switch in the row (if that's how this pcb was designed, every manufacturer does it a little differently) i know the DZ60 is a bit screwey in this area, diagnosed a handful in the last couple months.
do some poking around and see what you can find out. i can dig into it later (either this evening or tomorrow)