Lenovo手提電腦維修]Lenovo X1 Carbon 開機顯示0251:System CMOS Checksum bad-Default configuration used. Real Time Clock Error-Check Date and Time settings Press Esc to continue or F1 to enter Setup.
Bad BIOS checksum error! | CMOS checksum bad: default configuration used| How to solve it!?? [Hindi] - YouTube
Fix CMOS Checksum Error on Windows 10, 8.1, 8, 7, Vista, XP | Driver Talent