Power Distribution Board - Red LEDs on

[scherbs17]

This past weekend we wired up the full control system and completed the bench tests without a problem (no red LEDs). The system was handed off to the software team for work. Yesterday I noticed there were some red LEDs lit under some of the terminals. The software team reported that the motors connected to the terminals that had the red LEDs were working just fine.

Has anyone seen this yet? I checked the voltage on each set of terminals and sure enough, one of the pair with the red LED lit read a bit low (10.3V), while another reads a little high (12.4V), and still others right along with the non-lit LED terminals at about 12.2/12.3V.

The schematics on the FIRST site look like a FET may be bad.... that is if the big red 'X' on the schematic (???) doesn't mean the FET was removed in the first place.

I've double checked and triple checked the wiring and fuses. They're all good. We disconnected everything but the PD board and had some of the lights go out... some remain on.

I've included some pictures below and would appreciate any help or suggestions!

PD Loaded w/ red LEDs lit


PD Unloaded w/ some red LEDs still lit


Side profile of "good" side of PD board


Side profile of "bad" side of PD board showing possible bad assembly??