Pioneer kuro guru

[hawescass]

Hi guys thanks for the add
I have a pioneer kuro PDP-508a
It has a 2 Blue LED flashing fault code
 Failure in IIC Communication with the  module microcomputer
Just seeing if anyone knows a commom problem for this code trying to work my head around the manual and just can’t get it ( really think I need to print it out trying to look at on a iPhone is nuts 😂😂 )
Thanks