Troubleshoot Power and Disk Issues

Question 1

What happens when the pc doesn’t start?,

Answer 1

Usually there’s no psu that supples 12V to the motherboard/components and 5V/3.3V to processor and fans to run.

Question 2

What is an indication and cause of no power?

Answer 2

*Indication is the LED light on front panel
*Possible causes: faulty psu, cables, connectors or fuses.

Question 3

How to test if it’s the psu?

Answer 3

1. Check that other equipment in the area is working
2. Check the wall socket
3. Try disconnecting extra devices, maybe psu underpowered.
4. If you can ensure a safe working environment, test the PSU using a multimeter or power supply tester.
5. Possible faulty motherboard, if psu not the problem

Question 4

is a diagnostic sequence run by the firmware when a computer is turned on to check if the essential hardware components are working properly before booting up the operating system.

Answer 4

power-on self-test (POST)

Question 5

it’s a set of programs embedded in a computer’s motherboard that starts up the device, Loads the operating system, Recognizes hardware components, and Enables hardware components to communicate with each other.

Answer 5

System Firmware (BIOS)

Question 6

How to know if it is a POST issue?

Answer 6

• black screen, no beeps indicator, spinning sound

Question 7

POST troubeshooting

Answer 7

• Check updates
  *Check reset adaptor cards and connectors
  *check adaptor cards or devices on motherboard
  *Check PSU for right power to all components
  *Firmware or faulty cpu

Question 8

Post Indicator alerts

Answer 8

*1 short beep Normal POST—system is OK. Most modern PCs are configured to boot silently, however.
*2 short beeps POST error—error code shown on screen.
*No beep Power supply, motherboard problem, or faulty
onboard speaker.
*Continuous beep Problem with system memory modules or memory controller.
*Repeating short beeps Power supply fault or motherboard problem.
*1 long, 1 short beep Motherboard problem.
*1 long, 2 or 3 short beeps Video adapter error.
*3 long beeps Keyboard issue (check that a key is not depressed).