Support in other languages: 
Showing results for 
Search instead for 
Do you mean 
Welcome to the Lenovo Community

Welcome to the Forums!

Welcome to Lenovo's Peer-to-Peer Discussion Community!
Please note our guidelines. How to register and login and Community FAQs.
Shape the Future of PCs

Help Lenovo Shape the Future of PCs

Take the ownership survey. Share your ideas with our product team
Community Spotlight

Visit the Lenovo Blogs!

Check out the ThinkPad Time Machine
Visit the Community Spotlight Blog
Windows  10

Are you ready for Windows 10?

Get to know Windows 10
Visit the Windows 10 Support Center
Posts: 35
Registered: ‎04-12-2011
Location: Qatar
0 Kudos

T420s Bios update issues

Hi guys..


I have a Thinkpad T420s (4174 - EE2) . 


let me explain the story first.:-  My laptop is not getting ON. Then I unplugged one of the RAM (4gb + 4gb) its works fine. I tried this faulty (which is not working with my laptop) on another T410 laptop  then that one also working fine. I tested the two RAM with PC Doctor and all tests were passed.


Finally I tried to update the BIOS from bootable CD and Windows then it giving the meassage -


   "BIOS Directory was not found. The process did not complete"


I found some thread with the bios updating issue with some other models and people are suggesting to change the system board. Do I need to change the system board or is there any other solution for this?


Guys please help me !!


Lenovo PLease help meee !!

Posts: 35
Registered: ‎04-12-2011
Location: Qatar
0 Kudos

Re: T420s Bios update issues

Guys there is an update !!


I updated my BIOS to the latest version.


But still hte problem with RAM..


Help me please !!!!!!!!!

Bit Torrent
Posts: 2,401
Registered: ‎04-08-2011
Location: USA
0 Kudos

Re: T420s Bios update issues

Is this a new SoDIMM you purchased to upgrade the RAM from 4 to 8?

Bit Torrent
Posts: 1,552
Registered: ‎03-08-2012
Location: Belleville, Ontario Canada
0 Kudos

Re: T420s Bios update issues

Its not clear what he's done with the Ram. All Ram is not compatible so if you bought third part some will work (G.Skill) and others WILL NOT WORK.
T520 Model 4239 Intel(R) Core(TM) i7-2860QMbr>; Nvidia NVS 4200M Windows 7 Home Prem - 64bit w/8GB
Z70-80 I7 - 5500U 16GB GB - 1TB HD Window 8.1 64bit FHD 17.3 inch Display, Nvidia G840 w/2GB memory