Can't find the CMOS battery!!?!?

[kingtbone]

I can't find the CMOS battery on this motherboard! Could it possbily be integrated? I also can't figure out what type of board it is. It's an old pentium clone, and I see no where for an external battery. Any help appreciated.

[sennister]

This sounds interesting. Any way you can get some more info or a Picture?

[SB]

Look for a black thing with "Dallas" on it.

[Taco]

Look for a black block about 1 1/2" X 3/4". It will say Dallas on it. OR look for another black box about the size of a AA battery stuck or vecroed along the side of the case.

[Darren Wilson]

Don't forget the little blue or green Barrel type soldered batteries also.

[Star Fleet]

Hi shawnMt,

What do you do when you find Dallas.


Paul

[SB]

You look to see if it's soldered onto the mainboard or if it's in a slot. If it's in a slot - kinda like a BIOS chip then it can be easily replaced.

[AlienDyne]

Most of the times, it's not soldered.

If it is a barrel type and it's soldered, try to locate a 4-pin external battery connector, where you can connect an external battery.

[condor]

some CMOS batteries are integrated with the real time clock...

in some cases they are soldred to the board ( and they can come in different shape and sizes)

The best Idea is to try and find your mother board manufecturer and model - we might be able to help by locating a manual etc...

[Star Fleet]

G'Day Condor,

Thanks for the reply. Been through the sites but cannot find the Manual to the board. The MOBO has P55TP4 stamped on it. As I said I've been to Asus Site and quite a few others but they don't have this one.

Regards

Paul

[kingtbone]

I'm guessing it's integrated with the RTC. It's called a Houston Tech HT12888A Real Time. So how do I go about replacing this? It doesn't feel like it wants to come out. I'm surprised I got any replies with the lack of knowledge I provided, thanks everyone. I still can't find the external battery connector either. Anyone wanna guess about the location or maybe give an alternate form of what I'm looking for?

[Ruslan]

Here are few pages You should read about RTC replacement: http://www.resource800.com/dalsemi.html
http://www.baber.com/baber/computer_...ry/generic.htm

Good luck!

[condor]

http://www.asus.com.tw/Products/Moth...entium/P55tp4/
http://www.asus.com.tw/Products/Moth...4/spec-xe.html
http://www.asus.com.tw/Products/Moth...4/tp4xe-a1.gif


you couldn't find it on ASus site ? well I did

and I was right. Take a look at the bootom left corner - see that Black part (in the picture) this is your real Time clock and it's the integrated type.

you need to get a new RTC.

better yet - go to ebay and find another board... you can easily get an AT board based on Intel TX chipset - like the tyan S1571S ( Titan Turbo AT-2) or many others.

you'll get better performance for the same price..

[Star Fleet]

G'Day Condor,

Thanks for the info, been to those sites but they are not the same board as the one that I was working on. Looking at the picture of the board they are differant, but I guess that the RTC on both MOBO's do the same thing and if I get the system back (Which now works)except that the BIOS has a password in it stopping me from getting into it.

Thanks again

Paul

[Rkring1]

If you have the board working you can remove the CMOS password with KillCMOS , download it from the Windrivers utility section.It will reset all your CMOS settings to the default settings and remove the password . Your antivirus program will report it as a virus , but its not.