Looks like I found the solution! I recently came across another post on this forum, where user reported his g5050 showing similar symptoms as mine. Meanwhile, I'm not able to receive a response via the keyboard and the touchpad. The backlight continues also to Flash when turned on. The keyboard and touchpad all guard be offline sometimes.

It's been almost two weeks now, and I'm suddenly in the face of this problem. Lenovo flex-2 14 keyboard and touchpad with irregular response You will find an option to turn off the backlight on the keyboard. Start Toshiba Assist > optimize > Toshiba HWsetup. Hello, I have a bug: when I try to disable the sound by using the sensor button special funktion it turns off the keyboard backlight instead of sound but sometimes it works and turns off the soung but then the keyboard backlight is disabled and I have no idea how to activate it on the back.

How to enable keyboard backlight turn off my Satellite P775 program-11F?