I encountered this problem and was lucky to find the solution on this forum. To help others, I am making this new post with more detailed info.

Problem: you wish to update the BIOS (for whatever reason). You either do not have a CD-Rom (disc drive) in your machine, or it is not working.

Solution: locate an external disc drive, or better: install (even if only temporary) a CD/DVD drive: there are lots available for free from anyone who deals with computers.

Reasoning: the "flash using Windows" method is risky. I used it, because the drive that came with a "new"(used) computer was inop., and I didn't want to stop, find one and swap it out. The BIOS flash routine failed before completion and  therefore did not initiate a re-boot. The end result was that the computer would start, but hang after the BIOS loaded and went to boot the OS. No method of starting would work. {Described in this post: https://forums.lenovo.com/t5/ThinkCentre-A-E-M-S-Series/M92p-no-longer-booting-after-BIOS-update/td-p/3334060  }

Rant: the text file detailing the "Flash with Windows" utility should include a specific warning that flashing within an OS is inherently _RISKY_! It should strongly recommend using the "make a CD-rom disc" method. Furthermore, the instructions for recovery from the Hardware Maintenance Manual SHOULD BE INCLUDED!:

My compliments to the technical staff that created the CD-rom BIOS recovery program. It is "brain-dead" easy to use. Unfortunately, brain-dead management does not recognize the value and put it _Up Front & Center_.

Recovering from a POST/BIOS update failure: {from HMM}

If the power to your computer is interrupted while the POST and BIOS is being updated, your computer
might not restart correctly. If this happens, perform the following procedure to recover from the POST and
BIOS update failure. This procedure is commonly called Boot-block Recovery.

1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.

2. Remove the computer cover.

3. Locate the Clear CMOS /Recovery jumper on the system board. See “Locating parts on the system
board” on page 75.

4. Remove any cables that impede access to the Clear CMOS /Recovery jumper.

5. Move the jumper from the standard position (pin 1 and pin 2) to the maintenance position (pin 2 and
pin 3).

6. Reconnect any cables that were disconnected and reinstall the PCI card if removed.

7. Reinstall the computer cover and reconnect the power cords for the computer and monitor to electrical
outlets.

8. Turn on the computer and then insert the POST and BIOS update (?ash update) disc into the optical
drive. Wait a few minutes. Then, the recovery session begins. The recovery session will take two to
three minutes. During this time, a warning message will be displayed and no action is needed from you.

9. After the recovery session is completed, there will be no video, and your computer will automatically
turn off.

10. Repeat step 1 through step 4.
11. Move the Clear CMOS /Recovery jumper back to the standard position (pin 1 and pin 2).
12. Reconnect any cables that were disconnected and reinstall the PCI card if removed.
13. Reinstall the computer cover and reconnect any cables that were disconnected.
14. Turn on the computer to restart the operating system.

  ----------------------------- END ------------------------------------

Mod:  edited Subject line to add "ThinkCentre" and expand description

Hey! I have the same problem I wrote the image to DVD nothing happens no messages show up on the monitor. I used uthe internal DVD-Rom on the 92p. I moved the jumper as well.

Any Ideas?

Thank you in advance!

The CD/DVD disk has to be bootable, copying the file there will not work, it must be 'burned' so the ISO is bootable.  The jumper has to be absolutely moved into the correct position for your computer for recovery to work, this can be found in the HMM (see 'Read First' thread.)

You can test the disk on the computer where you created it.  Put the disk in the drive, restart, and it should boot from it into DOS, but go no further (as it is not the correct target computer.)   If it boots up into Windows as per normal, then it is not a bootable disk.  If it does boot into DOS, then on the ThinkCentre, watch for similar activity on the optical drive, there may be an issue with video. 

Be patient, the update process takes longer than you would expect. 

Thanks for your reply BiggAl!

I'm super frustrated i have two computers broken by Lenovo system update 5.

I did check the disk, it booted into Dos.

I moved the jumper from its original position to the one, that can be seen on the picture.

If still not updating, then: 

I have a loosely related issue. I purchased a refurbished M82 SFF. The unit continuously power cycles at ~5 second intervals and does not boot. If a memory card is removed it will power cycle twice and boot on the 2nd cycle. I tried clearing CMOS and that does not help. However, the first time I moved the jumper, I accidentally moved to across JP10 and JP15 in the image posted by Vo2max. With jumper in that position, the unit boots fine. And CMOS settings are retained. However, once positioned back properly, the unit power cycles continuously.

It seems like the JP10-J15 jumper is causing some type of error bypass and that allows the unit to boot. Unfortunately the HMM does not identify this jumper or indicate the function.

This board is running the 12/11/2018 BIOS. I did not update the BIOS.

One addition observation: The BIOS System Status reports that the power fan is not operating. However, I can see that the fan is spinning. 

Does anyone know what the JP10-JP15 jumper does?

Does the M82 SFF BIOS (TFX power supply) correctly report the power fan status?

Thanks!