I am having a problem with my GC (HP 6890). I was running samples for mineral oil using the MS, but I have changed over to use the FID for FAME testing. I have installed a new column, checked nuts, septa’s and connections. Everything looks good when I load the method and press run sequence to start my analysis. The GC tower goes and takes the vial and starts the pre-run prep but then stops and the injector stays in the sample vial, the GC screen then shows “waiting for ready external device”. I have checked everything I can think of, but nothing is making it actually start the run, any help would be greatly appreciated.