Date & Time are kept by RTC (Real Time Clock) CMOS Battery, which is usually a coin-cell battery on the motherboad.
As the RTC of your system is dead, it can not keep time.
Therefore, RTC (CMOS Battery) is required to be replaced with a new one to fix the issue.
Let me know if any further clarification is required. Hope this helps! Dont forget to rate the solution!!
CreativeTECH
Please find below the error on your laptop, i read it on other forum and it says that error 161 is a dead battery while 163 is a timer that was not been set properly.
161
(Dead battery.) 1. Go to Checking the Backup Battery
2. Backup battery.
3. System board.
163
(Time and date were not set.) 1. Set time and date.
2. System board.
Numeric error codes index - ThinkPad 600/E/X
hope it helps..
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