After upgrading a perfectly working M92p Tiny (type 3237) from Windows 7 to Windows 10, I went to the Lenovo driver portal for the latest drivers, all of which installed through Windows except the BIOS which kept failing without an error code. I found the ht077504 predecessor to this post, which led me to download the 9SJ979USA M92p BIOS ISO and burn to a CD. I opened the Tiny, moved the CMOS reset jumper, unplugged the hard drive, plugged the CD drive into the only black USB connector in the back and plugged in the VGA monitor (no keyboard or mouse connected). When I powered it up, the VGA screen lit, I watched the firmware get copied from 0 to 100 percent and the computer shut off when finished. I unplugged the CD drive, replaced the disk drive cable, moved the CMOS jumper back and connected the keyboard and mouse. When I plugged in the power, the fan and power light immediately started, but nothing else was working (mouse was not lit, no keyboard response, VGA light stayed amber).
I found and read this entire post and believe I have tried every combination of what is here, including locating and trying the same CD procedure with the newer 9SJ99CUSA M92p BIOS, and using RUFUS to FreeDOS format a 4 Gb USB stick and WinRAR to extracted and copy the files from both the 9SJ979USA and 9SJ99CUSA ISO files (one first, then the other), with the CD drive or USB plugged into the black USB connector on the back, the disk drive detached and the CMOS jumper in the reset position. In every attempt, regardless of whether the CD or USB stick is plugged into the black USB connector, when I connect the power, the power light immediately lights and fan spins, the CD or USB stick blinks a few times, then absolutely nothing happens (while waiting up to 5 minutes) and the VGA monitor never turns from amber to green. The only other sign of life is if the CMOS jumper is in the reset position (I believe I’m correct as there is no 1,2,3 markings on the system board) and everything is disconnected (no monitor, keyboard, mouse, disk drive or boot device), the M92p sounds two soft beeps every five seconds.
Everyone before me seems to have found a way to resuscitate their computer, so I am hoping someone has a suggestion for me. Thanks in advance.