G1315A, 1100 DAD: "diode leakage" error

This is a rare, but fatal error. Basically it means that the dark current measured during instrument startup is not within specifications. This points to a faulty optical unit. The G1315A is out of support since end of 2011 and we no longer have major repair parts, such as main boards or optical units available. I would strongly suggest to go for a new detector. Alternatively a pre-owned, refurbished  G1315C or G7115A should be available at an attractive price.

Thank you for answering, I was very suspicious about the fatal situation... I will first go on replacing the filter motor (who's faulty too) and lately I will consider your suggest. Wish you a nice day :)

you may check on the ribbon cable connection from the optical unit to the mainboard, i do encounter the similar error on the new G7117A DAD with the similar error message " diode leakage EE1041,0". After check on the cable connection, the errors message disappear. Hope it help. 

you may check on the ribbon cable connection from the optical unit to the mainboard, i do encounter the similar error on the new G7117A DAD with the similar error message " diode leakage EE1041,0". After check on the cable connection, the errors message disappear. Hope it help. 

It's worth a try, but usually, if the ribbon cable is not seated correctly, you'd see issues like baseline (drift/noise), no peaks, lamp intensity test fails, WL verification fails etc.

In addition, G1315A and G7117A are two different DADs, twenty years apart, based on two different platforms and with different optical units.

absolutely, in my case that the baseline noise and drift, lamp intensity failed, however i still can get the peak. Fully agreed, different platforms may have different symptom.