If your Tecan Freedom EVO is currently halted with a "Doorlock 2 not activated" message, follow these steps to isolate the issue: 

• Identify the Error: Look for code EVO_EVO_013_003 in the software interface. 
• The Manual Fix: Open and close the door manually to check for simple obstructions. 
• The Mechanical Fix: Use an Allen wrench to loosen the pin hole, realign it with the lock bolt, and retighten.
• Expert Escalation: Contact SeqGen for a full assembly replacement if the internal pin is bent, warped, or damaged. 

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.