Information Assurance and Security 1. Define Preventive Maintenance and identify the various benefits of Preventive Maintenance and tasks. 2. What is used to identify POST (power on self-test) problems? 3. What is the first step in diagnosing a completely dead computer that was working fine the day before? 4. A service technician just added a slave hard drive to working PC. When powered on the PC just gives a blank screen. What is the most likely cause?