thinkpad 770 question...

i have today the pleasure of working on a thinkpad 770...
It sees the battery in the littled led console, and windows (100% charged), it will run off the battery if i unplug the adapter, but it will not boot off the battery only...

side note, it was brought in for not holding BIOS settings, but that is not something i can reproduce now that i have set the date/time...

I was wondering if anyone had an idea what this might mean... I have been thinking the battery itself might be flaky, unfortunately i do not have a similar one to swap with...

thanks.

Just a hunch, check the contacts on the battery and in the battery bay. Might be dirty or bent out of shape.

Contacts may be flaky as Mac suggested, the issue could also be with the CMOS battery. If the computer is still under warranty. Chances are though that the mainboard needs replacement and that, outside of warranty is a fortune.

Thanks for the input.

It actually turned out to be the CMOS battery. As luck would have it, it uses a standard cr2032 desktop CMOS battery, and it is located in the memory expansion bay!! HOLY MOMMA, actual tech-friendly design!!!

I officially take back everything bad I ever said about IBM, that is the first notebook I have been able to get the battery out without having to dissassemble the whole damm thing...

[quote]Originally posted by Stanley_Kubrick:
<strong>Thanks for the input.

It actually turned out to be the CMOS battery. As luck would have it, it uses a standard cr2032 desktop CMOS battery, and it is located in the memory expansion bay!! HOLY MOMMA, actual tech-friendly design!!!

I officially take back everything bad I ever said about IBM, that is the first notebook I have been able to get the battery out without having to dissassemble the whole damm thing...</strong><hr></blockquote>

Well, IBM makes some things easy other things arn't, A mobo swap on a thinkpad is a 2 to 3 hour job and is the most common repair. When i was cranking them out, i could do a mobo swap in 2 hours flat. I've seen many laptops, but the only one's i want to own are IBM, Very compatible, very reliable and a warranty that can't be matched, how many companies will express courrier you an empty box so that you can ship them the computer... paying for ALL shiping costs?