Dear Colleagues,
apologizing for frequently wondering but I first faced this problem.
GC produces a signal without turning on the FID Detector!? Please look at the attached photo.

After turning on the detector and then conditioning the column while the instrument waiting for injection, the baseline is downward appeared as in the attached image.

for considering my type of sample is highly concentrated organic Solvents.
I assume that the carbon is scaled at the jet but I want to ensure from experts before I commence.