[Elecraft] P3 question

[Thaire Bryant]

I just finished rewiring and rearranging my operating position (K3s, KPA1500 and P3) along with my station computer.  On reassembling I found that all was good except for the P3, I lost the signal display and the waterfall.  I have no problem connecting to the three utilities and all show up to date firmware. The P3 shows the center frequency (VFO A) and displays PEP and SWR.  I have rechecked all connections and all appear to be correct.  Any ideas?  I can not find any help in troubleshooting areas of manual or Fred Cary book.

Thanks & 73
Thaire. W2APF