Lenovo laptop beeps 4 times continuously Win 10

[Suz_Suzanne]

My Lenovo IdeaPad slip laptop keeps beeping 4 beeps in this pattern: 1223. I looked it up and found it means there is a BIOS ROM checksum error. I tapped F2 on startup to enter the bios, tabbed to the exit screen to reset and save. This did not fix the problem. The laptop is still beeping those same tone pattern. I'm running Window 10 that was installed on 6/9/2021. Do I need to replace the battery? If so, how? Do I take off the back of the laptop?

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