[34S] occasional RTC reset upon power on

[John Galt]

Occasionally, perhaps once every five or ten times I power up the 34S, there is a slight but noticeable pause (about a half second) before the display turns on. Normally, it's instantaneous.

If this pause occurs, the only noticeable effect is that the RTC is reset - time and date are reset to midnight, 1 January 2007. No other memories appear to be affected. "Restored" does not appear.

It does not seem to be related to how long the calculator was previously powered down, however I cannot seem to cause it to occur if I repeatedly turn it off and on.

It could be related to weak batteries. They're not new, but the battery indicator has not yet appeared.

The behavior is the same using either the mainline code build 3747 as well as Bit's custom version.

Any ideas?