01-31-2017 10:59 AM
I have a type DY20 Thinkpad Yoga 14 and foolishly accepted recommended Lenovo System updates including a bios update. Shoukd have known better. The system will not boot at all now. I started the update from within the Lenovo maintenance system with 90% battery and AC plugged in. When i checked things 30 minutes later after the screen said shutting down i discovered the power button on and function key lit but no action. I just let it sit all night. Today no change and i can power off the system with the button but can't force it to boot.
The laptop had been working perfectly before this misguided bios update. The system is out of warranty. Is there any possibility of recovering the old bios or any other recovery method?
01-31-2017 02:03 PM
I attempted the update this morning and the download went smoothly. I assume it's installing now, as I have a black screen with the spinning circle of dots. Going on 7 hours now...
01-31-2017 02:45 PM
I hope yours is proceeding ok but I would be suspicious. My download was quick and the update application appeared to finish within a few minutes before the automatic shut down/restart. Nothing took hours of spinning circles. Just no reboot. I left mine in that state all night but out was no different 9 hours later. Good luck.
Anyone else have answers?
02-09-2017 05:10 AM
Problem solved! A local computer repair shop I have used that can do board level repairs was able to purchase a code for the bios chip and directly program the bios chip via Eeprom. Cost including their labor was $160. Much better than new motherboard or sending back to Lenovo for $650 which was not going to happen since BestBuy w as selling the same computer new last for $800.
06-23-2019 01:43 AM - edited 06-23-2019 01:45 AM
In case it helps others coming across this thread, be sure to try the CMOS reset procedure shown in this YouTube video:
Lenovo Post BIOS Black Screen Fix by Tim Tech
The basic steps are:
1) unplug the laptop
2) remove the back cover (8 captive screws and 1 loose screw)
3) disconnect the main battery
4) disconnect the CMOS battery
5) press and hold the Emergency Reset button for 10 seconds (and then also maybe the power button)
6) reconnect the CMOS battery and main battery
7) reattach the back cover
8) plug it in and start it up
It worked a treat for my Thinkpad Yoga 14 20fy and didn't cost a thing!
In my case, the BIOS update forced it to sleep, but waking it resulted in exactly the same symptoms (green Fn key light and red ThinkPad lights on, but nothing on screen, it wouldn't boot, and all I could do was power it off).