[time-nuts] Question about TSC5110

[AC0XU (Jim)]

I have several TSC5110s. One stopped working after a period of high temps in the lab.  It wouldn't complete the boot process - just displayed the spash screen, flashed off, then splash screen again. Power cycling gave the same result. Replacing the compact flash card didn't help.

Swapping cards between two units one at a time, there were no changes in behavior until I swapped the co-processor card. Then both units started working!

I am not sure what that is about. But I notice another thing - I can't change the date/time on either unit. I suspect the CMOS battery, but I can't find it. The CPU boards don't have the standard CR2032 or anything I recognize as a battery.  When I try to set the date/time, the units freeze up and have to be power-cycled.

Anyone know how to locate the battery on these CPU boards?

Also, any thoughts on why swapping the co-processor cards made both units start working?

Thanks!

Jim