Hi Mike,

 > I have an old Zenith 386-25 which is functional and all, but the BIOS
 > battery is either dead or going dead.  I've looked on the motherboard and
 > so on.  Can't see such a thing.  Or was this one furnished with something
 > like a Dallas chip with the battery built into the thing?  I'm apart from
 > all my documentation on this series.

The Dallas chip has a pinout on the botton of a 14/16 pin IC and it has a
sort of box on the top. If you find an item on the mother board like this
use the Net to confirm the identity.

You should be able to take top of this there should be a lithium cell which
you can replace, you will need to solder it in. Get a cell with solder tabs
on it.

Regards, Malcolm.

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