Is it possible to replace my laptop CPU?

I have a Lenovo G510 with an i5-4200m processor (Haswell). I added more RAM and replaced the 5400RPM HDD with an SSD but it needs to handle graphics better…

I'm not familiar with mobile processors and sockets and how or if they can even be configured… This was purchased mainly for school but video editing was a wishful thought. I miss my rig

Issues:
1) The current processor needs to be in a socket. If so, go to next step. If not, foget it.
2) You would have to totally disassemble the laptop. Not for the faint of heart…
3) Any upgrade would have to be supported by the BIOS. That you have to find out from the vendor.
4) Any newer CPU would have to be the same socket (of course), and the same thermal dissipation (or less). You can't put in a higher wattage CPU, as the cooling system can only handle the wattage it is designed for (even then, cooling is poor in laptops)

You can check this list (near bottom of linked page), for compatible processors. They seem to be all i5 types, just higher speeds. They are G3 sockets. You can't use any of the i7 listed, as their wattage is too high.
In my opinion, the best you can do is the i5-4340m, if the BIOS supports it.

http://www.cpu-world.com/CPUs/Core_i5/Intel-Core%20i5-4200M%20Mobile%20processor.html

No, it is fixed.
You can't do it.
Hope you understand…

Upgrading to an SSD no issues at all. Samsung do a solid range. Link below to the Pro and Evo I recommend. Will make a marked improvement in general operations.

http://www.memoryc.com/storage/ssd.html#Brands=Samsung&Form_Factor=2.5%22&page=0

Graphics are dependent on the CPU and GPU integration. Nothing can be fixed at this level. Laptops only really allow for RAM and hard drive upgrades. Nothing else only these areas.

Almost all laptop CPU's are socket mounted nowadays, so in theory, you can take one out and install another in the socket. The motherboard and BIOS must be able to handle the new CPU for a successful replacement. Consult the manufacturer for guidance.

In 99% cases, you can't replace CPU in laptop

Some can, others NO -

Your Haswell has at least an intel 4000 grfx chipset - adding a better haswell isn't going to make the difference youre expecting - by going to SSD, and adding more RAM - you have already done 2 of the key upgrades. Only other way to make it faster is to do a clean install of the OS, or clean what you have - thats it.

You can't dress up a Honda to be a Lamborghini