A technician is troubleshooting a desktop computer that fails to display video and emits a continuous POST beep code after a memory hardware upgrade. Arrange the diagnostic isolation steps in the correct order according to CompTIA hardware troubleshooting best practices.
- 1Visually inspect the motherboard for physical damage and verify that the 24-pin ATX and 8-pin EPS power cables are fully latched.
- 2Clear the CMOS settings using the motherboard jumper or RTC battery removal to reset hardware configurations and memory timings to factory defaults.
- 3Disconnect non-essential peripherals, secondary storage drives, and expansion cards to establish a minimal booting configuration.
- 4Power on the system to observe whether POST completes or the beep code changes under minimal hardware conditions.
- 5Swap the memory module across different DIMM slots or test with a known-good module to isolate slot versus module failure.
Answer
The correct sequence begins with visual inspection and verifying power cables, clearing CMOS settings to eliminate configuration issues, paring the system down to minimal boot components, testing POST baseline behavior, and finally testing RAM modules and DIMM slots systematically to pinpoint the root cause.
Standard CompTIA troubleshooting methodology requires starting with visual inspection and basic power checks, followed by clearing configuration settings via CMOS reset, reducing hardware to a minimal boot state (CPU, single RAM module, PSU), observing POST response, and finally swapping RAM modules/slots to isolate hardware defects.
Step-by-Step Solution
Key Concept
CompTIA Hardware Isolation Methodology for Memory and POST Troubleshooting