U5 was a ROT13(SCTN) but your answer is close enough to get credit.
U13 was a ROT13(SGQV HFO pbagebyyre), you can tell since it connects to J2. I don't recall what U1 is but you can ask marshallh (retroactive.be) since he's the guy who designed the board.
H4 vf n QENZ; W3 vf na FQ pneq; C2 ybbxf yvxr WGNT; H2 vf ANAQ synfu; H5 vf na nccyvpngvba cebprffbe; H13 vf n iert; abg fher jung H1 vf