kes7613@ultb.isc.rit.edu (K.E. Staffan) (03/19/90)
My 3b1 loses the date/time when I shutdown. I don't have any documentation. Could someone tell me where to look for the problem? (i.e. is there a separate battery, or is it a chip). Thanks in advance. Ken (Sorry for the cross-post. My site only gets comp.sys.att. An e-mail response would be great). -- Kenneth E. Staffan kes7613@ultb.isc.rit.edu -or- staffan@serum.kodak.com ~
donlash@uncle.UUCP (Donald Lashomb) (03/22/90)
In article <2508@ultb.isc.rit.edu> kes7613@ultb.isc.rit.edu (K.E. Staffan ) writes: > >My 3b1 loses the date/time when I shutdown. I don't have any documentation. >Could someone tell me where to look for the problem? (i.e. is there a separate >battery, or is it a chip). Thanks in advance. > Yup - sounds like your battery is dead ( quite common now that most 7300s are about 5 years old or more now). The battery is a 3v lithium that's soldered in the mother board - front left quadrant, near edge, about opposite the volume slide control that's on the right side. If I were you, I'd edit your /etc/rc file to ask the operator to enter the correct date and time before doing much else. Having the wrong date will muck up a few things. This will serve as a temp fix until you can change the battery. There a a couple of choices for the battery, all involve (de)soldering on the mother board, so if you are not comfortable with hardware stuff, find someone who is. 1) You could simply un-solder the old battery and solder in a new one of the same type. 2) You could un-solder the old battery and solder in a lithium button cell battery-holder. Then in 5 years, you just clip in a new lithium. 3) [what I did] Unsolder the old battery. Solder a couple of wires in place of the battery. Lead the wires back to near the fans. Attach two AA size Duracell(tm) alkyline batterys in series (1.5v + 1.5v = 3v) to the end of the wires. Be sure to get the pos-neg right. Probably best if the Duracells are in a holder - it's not really a good idea to solder directly to the batterys. Hope this helps -Don