How to replace the RTC battery

[Anglican_Dio]

Getting an error message on bootup which basically tells me the clock is wrong and to reset with the OS.  Makes me think a replacement RTC battery is required, but where is it?

[Dragon-Fur]

@Anglican_Dio 

The RTC battery is on the system board, of course.

Open

 HP ProBook 450 G5 Notebook PC - Maintenance and Service Guide

Page 73

Description                                Spare part number

RTC battery                                          746439-001

Considering that pretty much everything else has to come out / off first, you'll probably end up looking at more than the one page...

What else?

The clock should run, of course.

If you have not done so, check the sync setup...

Control Panel > Date and Time

Tab Internet Time

Change Settings

Check Synchronize with an Internet time server

Select a server from the drop-down list

Update Now

OK to save and exit

What else?

I've never checked for it; there MIGHT be something in the BIOS that impacts the clock / time setup.

If your BIOS is out of date, that might impact how the system perceives itself...

HP Firmware Pack (Q85) 

At this writing:  01.14.01 Rev.A

Date:  06-Nov-2020

Really reaching...

Could be there is a need to run Windows Updates - unlikely...

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HP ProBook 450 G5 Notebook PC 

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