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E4440A -340, Calibration Failed, Align_RF_Gain_Preamp

Question asked by afcal on May 7, 2015
Latest reply on May 21, 2015 by simon_coleby

We have a E4440A that has started failing the Align All sequence when powered on. The error is Calibration Failed, Align_RF_Gain_Preamp. The associated code for this failure is -340. Additionally, since this fails, the Systems, Alignments, Align all now, Needed is displayed. 

I have checked signals according to the service manual and can't seem to find anything wrong with the unit. Plus the battery has been changed. The service manual states this error could be caused by a number of issues.  The unit is also now trying to perform the Align All Now approximately every five minutes This unit is only five years old. Has anyone seen this problem and if so what seemed to be the cause and/or fix?