Cmos checksum error after cmos battery replacement, is it normal ? : r/techsupport
cmos check sum error problem - Troubleshooting - Linus Tech Tips
Solved: Replaced new cmos battery and got cmos checksum error - HP Support Community - 7182055
Keep getting a checksum error everytime the PC looses power/gets unplugged. Replaced battery and still same issue. Board is a 121-BL-E756-TR. - Album on Imgur
Fix CMOS Checksum Error on Windows 10, 8.1, 8, 7, Vista, XP | Driver Talent