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Bad BIOS checksum error! | CMOS checksum bad: default configuration used| How to solve it!?? [Hindi] - YouTube
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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.
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