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ThinkCenter M920q & x Tiny: damaged BIOS, how to initiate BIOS recovery (CMOS jumper, ISO)

2019-12-08, 19:40 PM

After last update of Win 10 after second reboot I saw Lenovo BIOS update screen with strange green percentage progress bar and chinese subtitles. I heard that there is a virus encrypting drives, so I turned off my computer before 100% :| Now after reboot nothing happens. Only green light on power button, and black screen ( I have two displays connected to HDMI and DisplayPort) this is the only possibilitie for this workstation - no vga port) .

 

I read Hardware Manual and I found procedure to clear cmos:

 

  • Locate the Clear CMOS/Recovery jumper on the system board.
  • If necessary, remove any adapters that impede access to the Clear CMOS/Recovery jumper.
  • Move the jumper from the standard position (pins 1 and 2) to pins 2 and 3

But I don't have any jumper like that I have place where there is subtitle JCMOS1 and three metal dots (HW, CLR, CMOS).

There is other jumper with 6 pins namesJP355 and default jumper is on the 5-6 pins.

 

1) Is resetting by the coin-battery is equivalent to the above procedure?

2) How I should set the jumper or maybe I should connect this metal dots some how ?

3) Is CMOS resetting is good direction? My target is to recover BIOS of course.

4) I read this post: 

httpss://forumslenovoo.comt55ThinkCentree-A-E-M-S-SeriesM900xx-amp-Tiny-Recover-from-failed-BIOS-updateCMOSS-jumpertdd-p/3509165 

but in my my motherboard jumpers and things looks differently.

Especially differently than here in chapter "Recovering from a BIOS update failure"

httpss://downloadlenovoo.compccbbssthinkcentreepdffm8000m9000_towerhmmmpdff

 

Mod:  edited Subject to add M920q model, and expand problem description

 

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4368 Posts

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Re: Probably damaged BIOS in Lenovo ThinkCenter M920x Tiny

2019-12-09, 12:47 PM

No, removing the coin battery won't force a BIOS update via a USB drive or USB CD drive, which is what needs to happen (initiated by moving the jumper.)  While the process is similar, your motherboard is probably different to a M900. 

 

I can't tell, since the top photo is too tight in, but is the location of JCMOS1 in location # 1 of the following diagram?  If not, can you post photos of that area.  Thx. 

 

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Re: Probably damaged BIOS in Lenovo ThinkCenter M920x Tiny

2019-12-09, 15:15 PM

 

Thank you. It looks like numer (1) is jumper dedicated for CMOS althought there are no subtitles near this place. But still default connected pins are 5-6 as you can see on JP35 jumpers. Where did you found this doc? Could you check is there special instruction for that model how to change this jumpers? I have official lenovo service near by my home and I gave them workstation but still Im interested because mayby I can help them.

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  • Message 4 of 13

Re: Probably damaged BIOS in Lenovo ThinkCenter M920x Tiny

2019-12-09, 15:38 PM

This is from the 'User Guide', on the Lenovo support page for your system.  However, there are no instructions on how to change the jumper to force a BIOS update.   It would be helpful if you could find that out for other owners.  Ty. 

 

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  • Message 5 of 13

Re: Probably damaged BIOS in Lenovo ThinkCenter M920x Tiny

2019-12-09, 16:02 PM

Yes ofcourse. Im still first stakeholder ;| I will try to ask my lenovo support service when it fix that (posiible in two weeks) but to this moment please leave the question opened. Maybe someone else knows the answer :| Thanks for help.

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  • Message 6 of 13

Re: Probably damaged BIOS in Lenovo ThinkCenter M920x Tiny

2019-12-09, 19:58 PM

First I watched this: https://www.youtube.com/watch?v=eQKVUzjMozE

It helps me to find subtitles which I didn't see before in real view but when I zoom the phote, subtitles are visible:

 

So with view on different photo Im shure for 88% that first line is like "SW_CLR_CMOS (2-4)" Im not shure only "R_"
Second line is "ME_D??? (1-3)" probably ME_DIS (1-3).

 

I found here: https://download.lenovo.com/pccbbs/thinkcentre_pdf/ipig_thinkcentre_201702_en.pdf

right procedure for my m920x "Recovering from a BIOS update failure":

 

"4. Move the jumper from the standard position to the maintenance position."

 

Maybe ME_D??? (1-3) stands for MaintenancE ??

 

I found one more thing: https://www.win-raid.com/t4454f16-Lenovo-M-P-SFF-no-post-video-beeps-1.html

" (..)

If anyone has one of these I would advise not to use Lenovo flash from operating system, it is not very reliable. Bootable USB much better..
These boards have the restore jumper position, and you can usually get working with Lenovo bios CD iso.
These boards have ME_DIS jumper, which is very handy.

(..)"

I will try to contact with support service toomorow... and now preparing CD with BIOS image and USB with the same. So maybe I can try this toomorow.

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  • Message 7 of 13

Re: Probably damaged BIOS in Lenovo ThinkCenter M920x Tiny

2019-12-10, 12:15 PM

So we tried with Lenovo Support Service employee two procedures:

 

1) "CMOS clear procedure"

Change jumper from 5-6 to 1-3 CLR_CMOS position and nothing happened (no sound signal), back jumper to the default position and still nothing so,

 

2) "Recovering after update BIOS failure" procedure

We changed jumper from 5-6 to 2-4 to ME_DIS position , we connected CD with latest BIOS CD iso dedicated for this model from lenovo. After turn on the computer there was no 2x beep signal ( as the procedure mention) but we heard that cd reader was reading the cd by about 1min and after that, LED the dvd-rw stoped lighting. Procedure mention that after finish copmuter should turn off  but it didnt. So after some minutes we turned off the computer  manually. Jumper back to 5-6 and

 

still nothing hapened :|

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  • Message 8 of 13

Re: Probably damaged BIOS in Lenovo ThinkCenter M920x Tiny

2019-12-10, 12:57 PM

During step 2, did you have a monitor connected, was anything displayed? 

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  • Message 9 of 13

Re: Probably damaged BIOS in Lenovo ThinkCenter M920x Tiny

2019-12-10, 13:04 PM

Yes, I had moniotor connected to DisplayPort ( using this: https://www.lenovo.com/us/en/accessories-and-monitors/cables-and-adapters/adapters/CABLE-VGA-cable/p/57Y4393 ) all the time, and nothing displayed :|

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  • Message 10 of 13

Re: Probably damaged BIOS in Lenovo ThinkCenter M920x Tiny

2019-12-10, 16:40 PM

I went second time to Lenovo Support Service and tried again with position 1-2 of jumper like on the photo from post below:

https://forums.lenovo.com/t5/ThinkCentre-A-E-M-S-Series/M900x-amp-Tiny-Recover-from-failed-BIOS-update-CMOS-jumper/m-p/3516934/highlight/true#M18716

For my device m920x the procedure say:

"4. Move the jumper from the standard position to the maintenance position."

But I did not find what is mean maintenace position in any documentation  :|

But I took a chance and move jumper not like in the description on the motherboard (which is 2-4 CLR_CMOS and 1-3 ME_DIS ) but like on the above photo (1-2). I heard two beeps after second restart. After that I used CD iso image of latest BIOS from LENOVO and it works !!!


So for sure maitenance position is 1-2. The rest of the procedure contains enough information to perform BIOS recovering.

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