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- HP Community
- Notebooks
- Notebook Boot and Lockup
- Message on start up

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03-23-2024 10:37 AM
I get this message when I start my computer:
The CMOS checksum is invalid. The CMOS will be reset to the default configuration and will be rebooted. Please check your BIOS Setup options to see if they change.
CMOS Reset (502)
ENTER - Reboot system
If I just wait it boots up. Computer also runs very slowly
Solved! Go to Solution.
Accepted Solutions
03-23-2024 10:49 AM
Hi,
Most likely you need to replace the RTC battery and then set the correct configuration (date, time ...) in BIOS
The part number is 665733-001 (search online with part number)
Ex
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p4432023.m570.l1313&_nkw=665733-001&_sacat=0
If you can not find the correct part you can probably take to a local PC repair shop and they can insert a new 2032 button battery for a few $
On page 64 of service manual you can see the steps to remove the battery
https://h10032.www1.hp.com/ctg/Manual/c04655205.pdf
"The computer is slow"
Have you replaced the Hard Drive with a 2.5" SSD, this would give a great boost to performance.
Have you inserted 16GB of RAM
It is also an older notebook.
Hope it helps,
David
Please click on yes for thanks
Please click on accept as solution if answered your question
03-23-2024 10:49 AM
Hi,
Most likely you need to replace the RTC battery and then set the correct configuration (date, time ...) in BIOS
The part number is 665733-001 (search online with part number)
Ex
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p4432023.m570.l1313&_nkw=665733-001&_sacat=0
If you can not find the correct part you can probably take to a local PC repair shop and they can insert a new 2032 button battery for a few $
On page 64 of service manual you can see the steps to remove the battery
https://h10032.www1.hp.com/ctg/Manual/c04655205.pdf
"The computer is slow"
Have you replaced the Hard Drive with a 2.5" SSD, this would give a great boost to performance.
Have you inserted 16GB of RAM
It is also an older notebook.
Hope it helps,
David
Please click on yes for thanks
Please click on accept as solution if answered your question