BIOS won't start. CMOS reset

[noprophet]

Hi, first post.

Updated my BIOS today. Lenovo Thinkcentre A61. When booting, it mentioned a CMOS error. I reset CMOS by shorting the jumper. Now I can't remember what the correct position of the jumper is, the labelling isn't clear. I've tried booting the PC with the jumper in every conceivable position and get no response - just the fans spin up.

Can boot without the jumper in place.

i've taken out the BIOS battery and am about the replace it to see if that makes a difference.

Thanks in advance for any help.

 

[spinning rust]

have you tried downloading the manuals for the laptop? i assume you have other means of internet connectivity since you posted.

 

[noprophet]

desktop. No manuals yet. Got it to load bios. Still getting cmos error after all that time trying to clear cmos.