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CMOS bios time&date 163 error

HP Recommended
HP Compaq NC 6710b
Microsoft Windows 10 (64-bit)

Thanks in advance for your aattention. I know it's an ancient model but upgraded to W10 and with 4Gb RAM & SSD still runs office like a charm. Well issue is with error 163 date and time not set up. I already swapped the CMOS button battery and everything should be OK. Bios upgraded to latest version. Yet error persists. I have scanned google for help but links are outdated and no real solution found. I can use te computer normally but solving this would be a relief. The bios battery is new and Bios saves changes but date still is not saved. I read something about changing the microcrystal chip but in 2020 I won't find any neither have soldering tools. 

Any help will be appreciated.


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