Can't find CMOS reset jumper on Lenovo Thinkcentre M58 motherboard

[itm]

I need to reset the CMOS on a Lenovo Thinkcentre M58, but I'm not sure which jumper to use, and I can't find the correct manual for the motherboard.
I've located three sets of jumpers:

• BIOS_WP / THER_HD - these are 3 pins aligned in an "L" shape
• CMOS_HW1 - a set of 3 pins
• CMOS_HW2 - a set of 3 pins

Can anyone advise re. which one to use to reset the BIOS/CMOS?

 

[itm]

Worst comes to worst removing the battery for a few minutes with the board unpowered should reset settings.

The BIOS_WP jumper will control what a firmware update can/can't re-write i.e. boot block, I'm not sure off the top of my head what HW1 is.

EDIT: I think this is the manual for that board https://www.manualslib.com/manual/449230/Lenovo-8820anu.html?page=76#manual but it isn't exactly clear which is the CMOS jump.

Thanks for the reply. I had already come across that manual - it looks like a slightly different board (and doesn't refer to the two pairs of jumpers labelled CMOS_HW1 and CMOS_HW2.

I've just tried removing the battery, waited half an hour, and rebooted. Unfortunately it hasn't resolved my problem, which is....
I get these errors from the BIOS on startup:
162 - Configuration Error - Default configuration used
CFG Error: TPM Initialisation failed
198 : System Security - Unauthorized BIOS Update Attempted
197 : System Security - Unauthorized CMOS change detected

Press F1 to Setup. F2 to resume.

Neither F1 or F2 do anything - the system just remains in this state.

 

[itm]

Is it an ex-corporate machine? possibly has hardware security configured in the BIOS/firmware which hasn't been removed.

Yes it is, from a large company which went into administration. Anything that can be done about this?

 

[itm]

Have you tried using a PS/2 keyboard, or just a different keyboard?

No PS/2 ports on the machine, and I've tried 2 different USB keyboards. With the 2nd keyboard I seem to be able to get it to boot if I hit the Enter key then wait quite a few seconds. So maybe all's not lost. It would be great to lose those error messages though.

 

[itm]

Tried replacing the battery?

Just tried it - same thing