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

itm

itm

itm

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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?
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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.
 
Last edited:
Rroff said:
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.
Click to expand...
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.
 
Is it an ex-corporate machine? possibly has hardware security configured in the BIOS/firmware which hasn't been removed.
 
Rroff said:
Is it an ex-corporate machine? possibly has hardware security configured in the BIOS/firmware which hasn't been removed.
Click to expand...
Yes it is, from a large company which went into administration. Anything that can be done about this?
 
Tetras said:
Have you tried using a PS/2 keyboard, or just a different keyboard?
Click to expand...
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 said:
Yes it is, from a large company which went into administration. Anything that can be done about this?
Click to expand...

Quite an open ended thing beyond my experience unfortunately. Some boards it can be as simple as shorting a couple of pins on a certain chip or removing via software, etc. other times a lot more complex.
 
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