I have a G4226A autosampler with a recurring error message. Movement of needle into seat failed [EE 4714, 3204]
This error started after the autosampler had been repaired by a field engineer. The main board had to be replaced; the computer was unable to communicate with the LC-QQQ system.. Before that repair, the system had been unused for over a month.
The error can happen on the first injection of a sample set, or after half a dozen injections, or it can run overnight with no problem. The needle and needle seat are both new. I had replaced the old needle and needle seat a few days before the mainboard failure. What is a good fix for this error?