[ltp] R500 suddenly won't post

[Paul Seelig]

On 11/03/2015 02:49 AM, dave@661.org wrote:
> 
> Where do I go from here?
> 
Have you already tried this trick?

* unplug the AC adapter and take out the battery
* push the power button 10 times in a row at one second intervals
* push and hold the power button for 30 seconds
* put the battery back in and turn on the Thinkpad
* the machine should start normally as if nothing happened

This reliably worked/works for me on T23, T60, T61, and an X220.

Some references:

http://ccm.net/forum/affich-710454-my-lenovo-laptop-won-t-start-power
https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/T410-can-t-turn-on-weird-problem/td-p/629465
http://www.masnick.com/2007/09/07/the-secret-thinkpad-powerbutton-code-to-bring-dead-laptops-back-to-life/

Also seems to work for oter laptop brands:

http://superuser.com/questions/190494/what-does-the-thinkpad-power-button-trick-do
http://support.hp.com/us-en/product/HP-G62-Notebook-PC-series/4078809/model/4194864/document/c01443371

Regards,
Paul