Problem: IF-AN/DM input clipping half of waveform?

[Fusion Head]

Hi folks, I have discovered a weird problem using the IF-AN/DM analog card. On channel 8, the input is clipping off most of the positive side of the waveform. I have thoroughly checked the signal chain going to this input, the outboard mic pre and cable are okay. And all other seven inputs are working okay. I pulled the card out and verified with an ohmmeter that all pins on the DB25 connector are connecting properly to the solder points. Has anyone seen this problem before? It would be sad if I had to ship the card in for repair/replacement and be without it for weeks. FH