11-11-2013 01:56 PM
Welcome to Lenovo Community Forums!
First Try doing a Power Drain.
Then Open Device Manager and open the Human Interface Devices
Uninstall all that starts with HID- then restart the system See if the problem will go away
If still the same I would consider this as a hardware Issue
You can contact Lenovo Technical Support here
02-11-2014 12:26 AM - last edited on 02-11-2014 09:05 AM by andyP
I bring my lenovo z400 to lenovo shop here in Philippines but what happened is my laptop's brightness function keys are not working, brightness not working always on low and the screen got smaller in size. I just say what they have done is this what warranty looks like. it sucks totally sucks. and the repairmen says that the LCD is defective my gawd
Moderator note; profanity / implied profanity edited. Please keep it clean. Forum Rules
03-08-2014 08:42 AM
03-10-2014 01:16 AM
Yes, Until now my Laptop is not fixed. Lenovo can't repair it. at first only LCD is the problem then it got even worst after the replacement of LCD. its been three months since the repair and i still can't have my laptop. it still broken. worst laptop brand ever. if i would buy another one it won't be lenovo.