I have a Lifebook AH532 running Windows 7 64-bit. I noticed in the last couple of days that the brightness control stopped working. Neither the function keys nor adjusting it via "Power options > Screen brightness" seem to work. I am unsure if it is related, but it could be due to an update I installed a week ago which was for the Battery Charging Control as described in this link. https://forum.ts.fujitsu.com/forum/viewtopic.php?f=95&t=45832
If that is INDEED the issue, can anyone guide me in how to roll back to a previous BIOS version where the brightness control would work again? And if not, has anyone been through this issue and was able to resolve it?