Quick-Start Diagnostic Summary 

If you are currently facing an instrument issue, follow this logical flow to isolate the source: Mobile Phase → Pump → Injector/Autosampler → Column → Detector.  

• No Signal? Verify the detector lamp is ON, check the wavelength setting, and purge the pump to remove air. 
• Pressure Anomalies? High pressure usually indicates a blocked frit or column; low pressure often suggests a leak or air in the pump heads.
• Peak Shape Issues? Address split peaks by replacing the guard column; resolve fronting by reducing injection volume; check fittings for dead volume if peaks are tailing. 
• Retention Time (RT) Shifts? Stabilize the column oven temperature and ensure the mobile phase is fresh and degassed.
• Expert Maintenance: Contact SeqGen for persistent Sciex MS sensitivity loss, internal Shimadzu failures, or annual Preventive Maintenance (PM)/compliance requirements.