Hey, sometimes it really is the ide header. If you know how to use a continuity checker, put one probe on the solder (NOT the ide metal pin part) and the other on the topmost tip of the metal pin of the ide header, Try to jiggle this pin with the probe. if there is no/or intermittent continuity you definitely need a solder job. Repeat for each pin. Differences in temperatures and putting on/pulling off the ide cable can cause the problem.

Send it to Eutronix for repair. They definitely know what to do.