Troubeshooting DIY LED

[mike31154]

What size wire are you using there to connect the LEDs? Looks a tad too large to me, which makes soldering difficult since you need a lot more heat with larger guage wire. Solder joints don't look too good in the last pic. My guess is you had a cold solder joint and all it takes is one to prevent current flow through your series of LEDs. You may end up frying all your LEDs or the small wire runs on the starboard by needing too much heat with large jumper wires to get a good solder joint. Also, not sure the way you've secured them with screws is the best way to go.