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A+ 901 CH5
Power System Support & Troubleshooting
Question | Answer |
---|---|
Good processor coolers maintain a temperature of _____ | 90-110 F / 32-43 C |
PWM | Pulse Width Modulation. Controls fan speed and noise. Enabled by the 4th pin on a 4-pin header on the mobo |
How is a fan powered? | SATA or 4-pin Molex |
For which socket does Intel recommend a liquid cooling system? | LGA2011 |
Important features of power supplies | ATX/microATX form factor, wattage ratings, # and type of connectors, fans inside the PSU, dual voltage options, extra features (warranty, quality, support for dual video cards, active PFC rating) |
What is a dual rail PSU? | A PSU with a 2nd +12 V rail (PSUs rated @ 1000 W or higher) |
PSU internal fan size range | 80-150mm |
Volages for dual voltage PSUs | 115 V for US / 220 V other countries |
Technologies used for dual video cards | SLI (NVIDIA) & Crossfire (AMD) |
What is Active PFC | Active Power Factor Correction. Active PFC is able to generate a theoretical power factor of over 95% using a circuit to correct power factor. |
Steps in the 6-step model for computer troubleshooting | 1. Interview the user 2. Backup data as needed 3. Examine the system and establish a theory 4. Fix the problem 5. Verify the fix 6. Document the outcome |
The four troubleshooting rules | 1. Check the obvious and simple things first (is everything connected, powered and turned on). 2. Trade known good for suspected bad 3. Trade suspected bad for known good 4. Divide and conquer |
Most frequent cause of improper contact between the mobo and the chassis | Missing standoff |
What windows utility can you use to test RAM? | Memory Diagnostics |
What can cause continuous reboots? | Overheating, a failing processor, motherboard, or RAM, or a corrupted Windows installation |
How many pins dow the CPU fan header on the motherboard have? | 4 |
If the power connector from the CPU fan has only three pins, it can still connect to the 4-pin header, but what functionality is lost? | PWM (pulse width modulation), which controls fan speed in order to reduce overall system noise |
How many beeps does startup UEFI/BIOS give to indicate a successful POST | One or zero |
Which 2 components in a system might give out a loud whining noise? | Power supply or hard drive |
What Windows utility can you use to test RAM | Memory Diagnostics tool |
What is the command prompt for the Windows Memory diagnostics tool? | mdsched.exe |
Which Windows tool is best to use to verify that hardware components installed in Windows are working properly | Device Manager |
What is a cooler made of? | Aluminum or copper |
Aprox. wattage for motherboard, processor, memory, keyboard, mouse | 200-300 W |
Approx wattage for a fan | 5 W |
SATA HD wattage | 15-30 W |
DVD/CD drive wattage | 20-30 W |
PCI video card wattage | 50 W |
File recovery software | 3rd party software that can help recover deleted or corrupted files |
2 examples of file recovery software | Get Data Back by Runtime Seagate Recovery Services |
When testing the voltage of an AC adapter for a laptop, the voltage should be within what range? | Plus or minus 5% |