This should be a pretty easy operation. Just throw any old 2060-771692 PCB on there, copy any ROM from the same model (-11ZSMS0), upload the LDR from that same resources you got the ROM from, and that should get you SA access. Then it's a simple ROM rebuild procedure. You might even be able to get away with using a ROM and LDR from a -11ZSMS1 or -11ZSMS2 for that matter.
Assuming the PCB really was the issue, and you aren't also dealing with bad heads.