My cpu locks at 0.40 randomly

[Cecil_123]

sometimes when i boot my laptop it runs normally and 2-3 Ghz but sometime the CPU locks at 0.40 Ghz,and the laptop performance drops soo bad. i don't know what causing this, my fans work well and i use the original charger, any help will be appreciated 

[Deep_World]

Hi  @Cecil_123 
 
Welcome to the HP Support Community!

Thanks for reaching out!

I appreciate the detailed description of the issue you're experiencing with your HP Pavilion laptop. I understand how important it is for your system to perform consistently, and I'll be glad to help investigate this further.

To better understand what's happening, could you kindly confirm:

• When the CPU drops to 0.40 GHz, does it happen only during startup, or can it occur while using the laptop as well?
• Have there been any recent  hardware changes before this behaviour started?
• Does reconnecting the AC adapter or restarting the laptop temporarily restore normal CPU speeds?

In the meantime, kindly try the following troubleshooting steps:

1. Perform a Hard Reset

1. Shut down the laptop.
2. Disconnect the charger and any external devices.
3. Press and hold the Power button for 15 seconds.
4. Reconnect the charger and turn the laptop back on.
5. Check whether the CPU speed returns to normal.

2. Check Windows Power Settings

1. Press Windows + X and select Power Options.
2. Click Additional power settings.
3. Select Balanced or High Performance (if available).
4. Click Change plan settings > Restore default settings for this plan.

3. Verify Processor Power Management

1. Open Control Panel > Power Options.
2. Click Change plan settings > Change advanced power settings.
3. Expand Processor power management.
4. Set: 
   • Minimum processor state: 5%
   • Maximum processor state: 100%
5. Apply the changes and restart the system.

4. Run HP Hardware Diagnostics

1. Turn off the notebook.
2. Power it on and repeatedly tap F2.
3. Run: 
   • System Tests
   • Processor Test
   • Thermal Test
4. Let us know if any failure IDs appear.

5. Update the BIOS

An outdated BIOS can occasionally cause power-management or processor-throttling behaviour.

Kindly check for BIOS updates using HP Support Assistant or from the HP support page for your model.

I hope this helps. 

 

[Cecil_123]

It usually happens at startup,i had a screen replacement a year ago , i always made sure i was on the lastest bios update .

[Deep_World]

Hi @Cecil_123

Thank you for the update. Since the issue occurs mainly during startup, your BIOS is already up to date, and the problem is intermittent, the most likely causes are power management, thermal sensor reporting, or a motherboard-related issue causing the CPU to become stuck in a low-power protection state.

Kindly try these simple steps:

1Reset BIOS to Default Settings

1. Turn off the laptop.
2. Turn it on and repeatedly tap F10 to enter BIOS.
3. Select Restore Defaults (or Setup Defaults).
4. Save and Exit.
5. Restart the notebook.

2. Check HP Hardware Diagnostics

1. Turn off the laptop.
2. Turn it on and tap F2 repeatedly.
3. Run: 
   • Processor Test
   • System Board Test
   • Thermal Test

If any test reports a Failure ID, kindly share it with us.

3 Check the Charger Detection

When the CPU is locked at 0.40 GHz:

• Open HP Support Assistant or BIOS.
• Verify that the AC adapter is detected correctly and showing the proper wattage.

Sometimes an adapter detection issue can force the processor into a very low-performance state even when using the original charger.