unexpected power shutdown of my desktop

[kiruyaye]

unexpected power shutdown of my desktop during start

[VikramTheGreat]

Hi @kiruyaye,

Welcome to the HP Support Community.
 

Thank you for posting your query. I will be glad to help you.

Thanks for reaching out—an unexpected power shutdown during startup on your HP desktop can be caused by several things, ranging from hardware issues to power supply problems or even BIOS/firmware glitches. Let’s go through a step-by-step to help you troubleshoot:

1. Check Power Source and Cables

• Ensure the power cable is securely connected to both the desktop and the wall outlet.
• Try a different power outlet or power strip.
• If using a UPS or surge protector, bypass it temporarily.

2. Inspect for Overheating or Dust

• Open the case (if you're comfortable and it's safe to do so).
• Check for dust buildup around the CPU fan, power supply, and vents.
• Clean gently with compressed air.

3. Perform a Hard Reset

1. Turn off the PC and unplug it.
2. Press and hold the power button for 15 seconds.
3. Plug it back in and try powering on.

4. Run HP Hardware Diagnostics

If the PC starts briefly:

1. Immediately press Esc, then F2 to open HP PC Hardware Diagnostics.
2. Run the System Test and Power Test.

If it shuts down before this, we may be dealing with a power supply unit (PSU) or motherboard issue.

 5. Try Booting into BIOS

• Power on and press F10 repeatedly.
• If BIOS opens and stays on, the issue may be with Windows or a driver.
• If it shuts down even in BIOS, it’s likely hardware-related.

I hope this helps.

Take care and have a good day.

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VikramTheGreat

HP Support