820-00165 No Turn On


Got an 820-00165 here on the bench which is causing some confusion. Green Light is there which turns orange as normal, ppbus present 8.6V.

Visual inspection revealed tiny amount of corrosion around u1930 - pulled this off replaced from a donor board and still no power. Pulled it off again and tried the board without U1930 and getting fan spin and no display (expected).

So i'm in a position now where if U1930 is on the board I get no fan spin, no power up. If U1930 is off then the board attempts to power up but doesn't give display.

Possible dead U1930 maybe? Or am I missing something completely obvious here! There is no corrosion anywhere else on the board that I can see!