These troubleshooting guides address various trouble scenarios and suggest possible solutions. DigiCart/II Instant Replay Caution 360 SYSTEMS PRODUCTS DO NOT CONTAIN USER-SERVICEABLE PARTS. REFER SERVICING TO A QUALIFIED ELECTRONICS TECHNICIAN. Electric Shock Hazard To protect against injury or electric shock, and to ensure against damage to equipment, you must disconnect the unit being repaired from AC power unless measuring operating parameters. Static Sensitive Components Components on the circuit boards may be damaged by static electricity carried on your fingers and tools. To avoid damage to components, always touch the metal chassis before touching the surface of the circuit boards.