HP 5890 II not responding. After power-up, initiates "Passed Self Test" routine but stalls at that point. The oven works, and FID is ignited but the light by "Not Ready" is lit up. ChemStation program states: "GC Not Found. Check that GC is Correctly Configured". Any assistance is greatly appreciated as I work as a Fuel Tech at Knoxville Raceway in Knoxville, IA, and time is short to come up with a reason and solution.