CMOS ERROR 502

[Nave1]

Within 3 Days The Battery Capacity is Major draw back from Basic Capacity

[VikramTheGreat]

Hi @Nave1,

Welcome to the HP Support Community.
 

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

The CMOS 502 error on your HP PC indicates a CMOS battery failure. This battery powers the BIOS firmware in your system, maintaining system time and hardware settings when the computer is powered off.

CMOS 502: The system has detected that the CMOS battery is either drained, missing, or not functioning properly.

Steps you can try:
1. Reset BIOS Settings

After replacing the battery:

• Power on the PC and press Esc or F10 to enter BIOS.
• Load default settings and save changes.
• Restart the system.

2. Update BIOS (Optional but Recommended)

• Visit the HP Software and Driver Downloads.
• Enter your product model and download the latest BIOS update.
• Follow the on-screen instructions carefully.

3. Replace the CMOS Battery

• Most HP laptops and desktops use a CR2032 coin-cell battery.
• You can replace it with:
  • Powering off the PC and unplugging it.
  • Opening the back panel (for laptops) or the side panel (for desktops).
  • Locating the CMOS battery on the motherboard.
  • Removing and replacing it with a new CR2032 battery.

⚠️ If your device is under warranty, you have to contact HP Support before opening the device.

I hope this helps.

Take care, and have an amazing day!
 

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Regards,

VikramTheGreat