Attention: The forums are currently placed on Read Only.

Thank you for visiting the CNET forums. Our site is currently undergoing some maintenance. During this period (6:30 AM to 8 PM PDT,) you can read the forums content, however posting in the forum will not be available. We apologize for this inconvenience. Click here to read details

Desktops forum

General discussion

Compaq Prolinea 575 CMOS/Clock Battery

by dtroisi / July 14, 2005 7:11 AM PDT

I would appreciate some help! I've ordered, and received a Compaq Prolinea 575 CMOS battery. It is a Rayovac 840, 4.5v Alkaline Battery. When I opened my machine, I located a schematic showing the Location of an "internal Clock/CMOS battery" (a coin shaped lithium battery currently in place). The schematic also shows the location for connecting an "external Clock/CMOS battery" connector that would seem to accommodate the battery I received. There are instructions on the schematic for jumper positions for either "internal" or "external" Clock/CMOS battery (currently positioned for the "internal" battery) with instructions for positioning for an "external" battery.
It would seem, by changing the jumper arrangement for an "external" battery and hooking up the 4.5v alkaline battery, I should be in business and the dead lithium battery would be by-passed. Can you confirm this for me?

Thank you,
Dino R. Troisi

Discussion is locked
Collapse -
Seems like a lot of work to me. . .
by Coryphaeus / July 14, 2005 11:40 PM PDT

Why not just go to a hardware store, grocery store, Radio Shack, etc. and buy a two dollar replacement for the lithium battery? I hate to ask what you paid Compaq.

Lithium batterys typically last 4-5 years.

Back to your question, "Sounds logical to me".

Collapse -
i agree
by AKonny47 / July 15, 2005 1:34 AM PDT

just buy a new replacement. dont stress yourself over things that arent necesary.

konny

Collapse -
Closing the Loop
by dtroisi / July 15, 2005 8:05 AM PDT

For whoever may be interested, I have installed the connected 4.5v Alkaline CMOS/Clock replacement battery and moved the jumper as instructed on diagram. The jumper move by-passes the dead Lithium battery on the board and activates the leads for the Alkaline battery connection. I've done it, and all is well again. All systems are go. There apparently are some older boards that allow you to make the fix this way. I read somewhere some of the older boards have the CMOS/Clock battery hard wired to the board making removal virtually impossible. Anyway I hope this experience is helpful to someone.

Popular Forums

icon
Computer Newbies 10,686 discussions
icon
Computer Help 54,365 discussions
icon
Laptops 21,181 discussions
icon
Networking & Wireless 16,313 discussions
icon
Phones 17,137 discussions
icon
Security 31,287 discussions
icon
TVs & Home Theaters 22,101 discussions
icon
Windows 7 8,164 discussions
icon
Windows 10 2,657 discussions

FALL TV PREMIERES

Your favorite shows are back!

Don’t miss your dramas, sitcoms and reality shows. Find out when and where they’re airing!