I have Latitude E6330 which has been working fine for years with Win 7 and original BIOS. Recently, it's been upgrade to Win 10 with latest BIOS. But since then, after a week of working, it start having boot-up issue.

When I boot-up the server, it has the Dell Logo then shutdown after few seconds. If I press F2 to go into the BIOS then exit (without changing any setting), it will boot up normally. And this procedure works for a week or so, and now, even using the procedure will not be boot-up.

I have checked the BIOS log, it stated that "ASF2 forced off". Checking in this error on this community, and seems like there are a number of reason included driver issue, but seems all are related to random shutdown, not constantly shutdown at boot-up time. 

There is one respond which seems may be related... the CMOS battery needed to be replaced. As I am on the original CMOS battery and the power battery pack also end of life as reported by the diagnose tool (everything else are showed up as normal during the test), I think this may be the cause. I am ready to purchase and replace both the battery pack and the CMOS battery, but I just want to confirm if this is "really" the issue (ie. will this be fixed after the replacement)? Just want to be sure before I placed the order.