Have you considered replacing the CMOS/RTC battery, that tends to be a good idea every few years.. they are meant to last a decade or so, but, this system is probably significantly older than 10 years.
Trying to compensate for a problematic RTC using network time is only going to be a pain, and it's going to keep losing seconds, minutes or hours.
You can find them practically anywhere these days, official name is CR2032, it's a 3 volt button cell.
As for the keyboard issue, have you attempted to use another?
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