Here is a list of all the LLANO CPUs that will work on the FS1 socket of your laptop: http://www.cpu-upgrade.com/CPUs/AMD/A6-Series_for_Notebooks/A6-3420M.html
This list is probably outdated but gives you a general idea of the type of laptop this is compatible with A6-440M CPU:
The Trinity CPU uses a FS1r2 socket while the Llano CPUs uses a FS1 socket.
According to CPU World, Trinity and Richland CPUs won't work in a FS1 motheboard socket:http://www.cpu-world.com/Sockets/Socket_FS1.html
As BlackZion mentioned, you need to contact your laptop Support site to see which CPU is supported on your laptop with a updated BIOS.
If you Laptop Support doesn't have a BIOS to support the CPU you want to upgrade to, then you are out of luck. It won't boot up.