Not much. Motherboards are tightly integrated, and you can't really upgrade the built-in components; that's what expansion slots are for. If you possess sufficient soldering skills, you may be able to replace bad components like capacitors.
Buttholes!
Field Replaceable Units
Field Replacement Units (FRU)
field replaceable units (FRU)
there are many components on the system board that can be replaced without taking it to the manufacturer, it depends on youe expertise on hardwares, ranging from replacement of the processor to RAM, etc
A very useless motherboard
motherboard is dere or not??
There is no good way to test a CPU without putting it onto a compatible motherboard.
A Motherboard.
it depends on Where it is leaking from and who the manufacturer is. Moen will replace your cartridge and or faucet for free as they have a lifetime warranty. if it dripping Under the sink you could have a bad valve which means that the entire faucet will need replaced. if it is dripping from the spout it is most likely the cartridge which can be repaired or replaced without having to remove the entire faucet. contact the manufacturer.
Every PC has to have either graphics embedded into the motherboard or either a a dedicated graphics card that fits into an expansion slot on the motherboard. You can buy a motherboard without graphics, but you would need to supply a graphics card to go with it.
No, a processor is not fixed to the motherboard. Most modern processors are designed to be easily removable and replaceable using a socket on the motherboard. This allows for easy upgrades or replacements without replacing the entire motherboard.