BIOS battery location

[Mikey7010]

Hi, I am getting a clock time error during boot, so I have to replace the bios battery.

Where can I find it (Probook 6550b).

Thanks.

[CharlieItuah1]

The BIOS Battery is also referred to as the CMOS battery which is located toward the middle left area of the motherboard.

The wrong time basically means that your PC is showing the incorrect time in Windows even after you may have adjusted it various times in settings. The correct time is important for such things as updates (which can be blocked) and various software which will not run with the incorrect time. Naturally, it is also always useful to just know what time it is 

So, that is what you must first check. Is the time set correctly in Windows Settings (right-click on the clock in the lower corner of the desktop and click on change date/time).

-check date and time

-check you have the correct time zone for your country

-you can also leave automatic time synch switched on which will check with a server and synch the correct time to the PC. (after a while)

You can also check if the correct time is set in BIOS.

-Turn off PC by holding the power button

-Turn on PC and continuously press ESC until startup menu appears

-Press F10 to enter BIOS

-Set the correct date and time and exit BIOS saving changes

[Paul_Tikkanen · Accepted solution]

Hi, @Mikey7010 

See the service manual at the link below, chapter 4, page 96 for how to remove and replace the RTC (CMOS) battery.

c03471180.pdf (hp.com)