I think I broke it... I get the same voltage from the 5 volt psu on the "LDA" power. When I was going to hook it up for a try the LDA+ came off and it took me several tries to get it back on. I think I somehow "erased" the part of the board that insulates the 5volt + and the LDA +... I didn't try the diode cause I tested it, but I don't think I can fix the board now... Maybe at FLEM...
Off to bed. I got one day till the weekend.