Looking for two parts

so I was told that my motherboard and processor burned out or something and now I'm looking to replace the two without changing my tower. I didn't have any problem with how the pc ran (up until it broke) so if I could just get a nice, but affordable, replacement to get it back up and running like before would be the best idea for me.
So basicly i need a motherbaard that goes with the dell xps 400 and a processor that goes inside. I don't know of many sites thst sell these for cheap, or at all, so i really need help looking for these so that i can stop surfing the web on my ps3 ~_~;

Jam it back in, in the dark.

fruckin crap! no wonder they said i needed a new case for the motherboard. Thanks for the info dude, didn't really feel like a rant, just felt like info i didn't know ~_~.
Anyways I got the pc for free, if i had the money at the time then i would have taken more time and built but what i need to do know is save myself some money.
Since I really do need a tower and motherboard, do they have to be manufactured by dell or can I get differents brands as long as all the previous parts fit inside (hdd, ram, tv tuner, power supply etc.) since I noticed that dell uses different parts.
I just need a point to the right direction so i can get this stupid thing fixed ~_~

There's nowhere I can't reach.

ok cool thnx, thats what I needed to hear.
they told me at the shop that it would take me 300$ to repair so if I have to spend that much on it then I'd rather get the parts myself and make sure its good quality stuff. If I have to go a bit over than 300 for quality then i guess so be it. but yeah, i do do some moderate gaming so i'll probably go with intel and invest with a video card later in the future. Right now i'm just worried about getting the damn thing fixed.
If there is also linkage for a decent motherboard (cheap but nice if possible, if not then whatever) I wouldn't mind seeing it as well. Thanks for the guys.

This thing is sticky, and I don't like it. I don't appreciate it.

i'm reminded how much of a cheap bastard i am when i looked at those prices ~_~
The case and the mobo i may get but i don't suppose there is a a cheaper solution for the proccessor. All i'm interested at the moment is getting my adobe programs to work nicely, my sister plays sims2 from time to time but if a cheaper cpu means not being able to play that for a while i think she could live without it for a while

I am a dolphin, do you want me on your body?

haha dude its alright. I didn't specify anything becuase I myself would have still liked to play games like fear or maybe bioshock in the future =p

I was speaking idiomatically.