Pictorial disassembly guide for the Toshiba Satellite C655 and C650 series of Notebook PCs,http://www.irisvista.com/tech/laptops/Toshiba-Satellite-C650-C655/disassemble-toshiba-laptop-1.htm
You can click on each photo one at a time, to enlarge.
1) Observe Anti-Static Precautions
Your body carries Static electricity. Static WILL fry out (Short Circuit) the delicate hardware components inside a computer.
I suggest you buy, and wear an ESD wrist strap, and connect it's alligator clip to a good ground source.
Example of an ESD wrist strap,http://www.radioshack.com/product/index.jsp?productId=2103245
I connect to an unpainted surface, of the metal frame of an empty desktop computer case.
If your table you're working on has metal legs, connect to an unpainted surface on one of them.
Barring none of the above applies, at least place a large metallic unpainted object on the table, and connect to it.
Perhaps a metal serving tray, or metal (Unpainted) knickknack.
2) Use a multi-compartment container for the various screws you will remove.
Label each compartment for the area the screw/s come out of.
If no multi-compartment container is available, use a clean egg carton.
label each egg holder.
Some screws look VERY similar to other screws.
Do Not mix them up.
What do you mean by reset motherboard? If your thinking is that you are going to remove the CMOS battery for a while, then reinstall it to clear a BIOS password, this = no.
There is a capacitor on the motherboard which keeps enough residual power, so that the BIOS password stays in play, even with the CMOS battery removed.
(The CMOS battery is referred to as the RTC Battery. Real Time Clock battery.
As soon as the Keyboard is removed, it is right there on the motherboard. Uses the same battery holder as a desktop computer, and it looks to be a CR2032, just like a desktop CMOS battery )
There are two pads which are shorted across briefly, with a small flat tip screwdriver.
Usually rectangular in shape, and each approximately the size of a BB.
This drains the residual power from the capacitor.
Generally under a small piece of Mylar plastic sheet, and sometimes under the Ram Memory modules, or under the wireless module.
Also, this link has a free Service Manual,http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-toshiba
Under the Toshiba main heading scroll down to the subheading that begins with -
Go to the second line in this 'paragraph', and scroll across to C650.
Left-click on C650.
(You may also want to take a look at C655D)
After you click on the file name C650, it may take up to 30 seconds before the first page comes up.
It may also take additional time for the file to fully download.