Studio Spot 250 no response to DMX

I have a studio spot 250 that stopped responding to DMX
I swapped the main board to another light that was working fine and the problem followed the board
The good board from the good light also worked in the problem fixture so im pretty sure its a problem with the board...

The board will run all self tests, the light works fine in all self tests but it does not accept any DMX signal

when the lights goes to home it flashes link on the display for a moment when normally I would see INIT...

is there any setting I can check?
any resistors or other parts I can check on the board that might cause this issue?

I really dont want to have to send this board in for repair :( but I have the feeling thats what im going to have to do

I did check and the light is set to DMX and not fixture number
it is on C047 and the other light does work on that channel as well

for testing the were hooked up 1 at a time

thanks in advance!

~Mack
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