Thanks for the advice. This one was pretty mangled so I wonder if it's worth the expense. The A4000 was rescued from a junk pile. Case top and riser were missing so the board was pretty much exposed.I wonder if it can be repaired since some of the tracks look damaged from various bumps with other objects. Everything else seems okay, so I may just use it as spares for another A4000 unless I can find a board.