ASUS Certified System Troubleshooting 2 — Questions and Answers
Question 1: An ASUS laptop powers on but the screen remains completely black. The power LED is lit and the fan spins. What is the FIRST step to diagnose this?
- Replace the LCD panel immediately
- Connect an external monitor to test if the GPU and system are functional (Correct answer)
- Re-seat the RAM modules
- Flash the BIOS firmware
Correct answer: Connect an external monitor to test if the GPU and system are functional
Connecting an external monitor isolates whether the issue is with the display hardware or the GPU/system board.
Question 2: A customer reports that their ASUS desktop randomly shuts down during heavy gaming. Which component is the MOST likely cause?
- Faulty keyboard
- Inadequate power supply unit (PSU) wattage (Correct answer)
- Corrupted Windows installation
- Loose SATA cable on the HDD
Correct answer: Inadequate power supply unit (PSU) wattage
An undersized or failing PSU cannot deliver enough power under load, causing the system to shut down.
Question 3: After upgrading RAM on an ASUS motherboard, the system beeps three times and fails to POST. What does this typically indicate?
- The CPU is overheating
- The RAM is not properly seated or is incompatible (Correct answer)
- The GPU needs reseating
- The CMOS battery is dead
Correct answer: The RAM is not properly seated or is incompatible
Three beeps on most ASUS BIOS codes signal a memory error, often caused by unseated or incompatible RAM.
Question 4: An ASUS system displays a 'No Boot Device Found' error. The drive appears in BIOS but Windows will not load. What should you check next?
- Boot order in ASUS BIOS/UEFI settings (Correct answer)
- GPU driver version
- CPU core count
- Network adapter settings
Correct answer: Boot order in ASUS BIOS/UEFI settings
If the correct drive is not first in the boot order, the system will fail to find the OS even though the drive is detected.
Question 5: A technician notices the CPU temperature on an ASUS system reaches 105°C under load. What is the BEST corrective action?
- Increase fan speed via software only
- Clean the heatsink, reapply thermal paste, and verify cooler seating (Correct answer)
- Reduce CPU voltage in Windows
- Disable Turbo Boost in Device Manager
Correct answer: Clean the heatsink, reapply thermal paste, and verify cooler seating
Dried thermal paste and poor cooler contact are the most common causes of excessive CPU temperatures requiring physical remediation.
Question 6: A user cannot access ASUS UEFI BIOS after enabling Fast Boot. How can they re-enter BIOS?
- Hold F8 during POST
- Use the 'Restart to UEFI' option in Windows Advanced Startup or clear CMOS (Correct answer)
- Press Del after the Windows logo appears
- Remove the GPU and reboot
Correct answer: Use the 'Restart to UEFI' option in Windows Advanced Startup or clear CMOS
Fast Boot skips hardware initialization screens, so Windows Advanced Startup or CMOS reset are the reliable methods to enter UEFI.
Question 7: Which ASUS utility is used to update motherboard BIOS from within the UEFI interface without a running OS?
- ASUS AI Suite
- ASUS EZ Flash (Correct answer)
- ASUS GPU Tweak
- ASUS Fan Xpert
Correct answer: ASUS EZ Flash
ASUS EZ Flash is the built-in UEFI tool that allows BIOS updates directly from a USB drive without booting into an OS.
ASUS Certified System Troubleshooting 2
An ASUS laptop powers on but the screen remains completely black.
The power LED is lit and the fan spins.
What is the FIRST step to diagnose this?