During an analysis on the 6470 spectrometer, an error message was displayed concerning the LC part. We have carried out several tests with Lab advisor but the error messages persist at the level of the column, the autosampler and the pump. We have checked the firmware version but the message is the following: multi purpose valve position "Blocked"
What can be done to remove this error message especially since everything is blocked except the mass part?
Thank you for your response