CMOS Checksum Error on HP 15-CC0XX

[Rezaulkrefath]

Hello Developers and Experts,
I am facing CMOS checksum is invalid. Error 502 on Hp 15-cc0xx. I try to fix this problem, but unfortunately I can't fix this problem permanently. Give me suggestion to fixed that problem. Sometimes I lose my temper because of this.

Device information: 

SYSTEM PRODUCT NAME HP Pavilion Laptop 15-cc0xx BIOS F.41 12/01/2020 OS BUILD 19041.1.amd64fre.vb_release.191206-1406 PLATFORM ROLE Mobile Model

[Personal Information Removed]

• A problem occurs for this:
  1. Computer shutdown automatically after (10-30)min, unplug my power supply.
  2. After shutdown, the Laptop didn't boot if I didn't connect the power cable.
  3. My Internet speed meter shows the setup many when my pc open.
  4. My antivirus licence file diaspore from the antivirus from application.
  5. sometime times shows incorrect.
  6. after boot my laptop, all the application and all the unchanged work aren't resumed.
  7. have trouble to write anything on find tab.

1. Method, which I applied to fix these issues.
   1. changed my laptop battery, But that problem didn't fix.
   2. Download bios from the official Hp website and update BIOS. But that problem didn't fix.
   3. update the windows, But that problem didn't fix.
   4. Restart my laptop, several times. But that problem didn't fix.
   5. Open the backside of my windows, I didn't find any CMOS Battery or CMOS battery place.
   6. disable legacy support. But that problem didn't fix.

Battery Reports

[Rezaulkrefath · Accepted solution]

I Fixed this issues by perform simple tricks, and it's work for me

•  I tried to update my BIOS by installing BIOS application from HP Official driver website. After updating, The CMOS error came. That's not work for me.
• I tried to Recover BIOS. The procedure is, First turn off your computer, Press windows + B key then power on your pc. The BIOS recovery mood will be started. But overtime the final massage is "A BIOS recovery occurs" and show me some errors. That's tricks didn't work.
• The final working tricks is. I went to Device manager, → Firmware → System Firmware. Right-click on this firmware and Update Driver.  I scan for automatic update for driver. But it will not help you.  Select Search for updated driver On Windows updates.

Boom ! Update the driver and restart to make this update. That will fix the BIOS CMOS ERROR.