Error 502

[MaryAnd_21]

Hello, I've been having problems for months when I play Valorant, my laptop turns off out of nowhere and the inscription "locking" appears before turning off, when I turn it back on I get the following inscription:

"The CMOS checksum is invalid. The CMOS will reset to the default configuration, and the computer will restart. Afterwards, please check the BIOS setup options to see if they change.

CMOS Reset (502) "

I tried scanning the QR code and entering the link but they don't work anymore.

I've searched and I see that when this error appears, people's laptop stops turning on and when they try to charge it, it doesn't charge, however I haven't had that problem.

I want to seek help to know if I should take it to the technician or if I can fix it myself.

The laptop model is hp-victus-16-d0502la.

[Sneha_01]

HI @MaryAnd_21,

Welcome to HP Support Community.

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

The "CMOS checksum invalid" error you're encountering usually indicates a problem with the CMOS battery or BIOS settings on your laptop. This issue can cause system instability, such as the sudden shutdowns you're experiencing while playing Valorant. Here’s a step-by-step guide to troubleshoot and potentially fix the issue:

1. Understand the CMOS Error

CMOS Battery: The CMOS battery (a coin-cell battery on the motherboard) powers the BIOS firmware settings and the real-time clock. If the battery fails, it can cause the BIOS settings to reset, resulting in errors like the one you’re seeing.

BIOS Settings: An invalid CMOS checksum means that the settings stored in the BIOS are not matching the expected values, often due to a failing battery or corruption.

2. Basic Troubleshooting Steps

a. Power Cycle the Laptop

1. Turn Off: Shut down your laptop.
2. Disconnect Power: Unplug the power adapter.
3. Remove Battery: If possible, remove the battery (for laptops with removable batteries).
4. Press Power Button: Hold down the power button for 15-20 seconds to discharge any residual power.
5. Reconnect and Restart: Reinsert the battery (if removed), plug in the power adapter, and turn on the laptop.

b. Check and Reset BIOS Settings

Enter BIOS Setup:

• Restart your laptop and press the key to enter the BIOS setup. Common keys are F2, F10, Delete, or Esc. Check your laptop’s manual for the specific key.

Load Defaults:

• Inside the BIOS, look for an option to Load Default Settings or Reset to Defaults. This will restore the factory settings and may resolve configuration issues.

Save and Exit:

• Save the changes and exit the BIOS setup.

3. Replace the CMOS Battery

If the error persists, you may need to replace the CMOS battery.

a. For Laptops with Non-Removable Batteries

1. Consult Manual: Check the laptop’s manual or HP’s support website for guidance on accessing and replacing the CMOS battery.

4. Check for System Stability

Once the CMOS battery is replaced:

1. Reboot: Restart your laptop and see if the error is resolved.
2. Monitor: Use your laptop normally and check if the unexpected shutdowns or CMOS errors continue.

I hope this helps.

Take care and have a good day.

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Rachel571

HP Support