Here are a couple items to check, from when I looked over the picture. Not sure if they are anything or not, just ideas for things to check.
- There seems to be a scratch across the vias where the negative battery terminal attaches (near B2). You might check where the traces lead for continuity (if it is a scratch and not just an issue with the photo)
- Where the leads for C5, C140, C122 connect to the board, could maybe use more solder on the connection (it might be fine, you could check continuity, but they look 'skimpy' from the top)
- Y1 looks a bit askew, (maybe make sure that the one lead isn't damaged)
- Recheck the power at the battery connections to the board and be sure you have the right amount of power coming from each battery.