Dell 1100 Inspiron Celeron Processor Dead

Can any one tell me:
On a Inspiron 1100 with a 2.0 Celeron, is this the same processor as
the desktop or is there a mobile celeron.

If there is a mobile celeron 2.0 processor where can I buy one

What would be the highest processor I could put in my Inspiron 1100
that originally shipped with a 2.0 celeron.

I am pretty sure its a bad processor but I want to fix it myself. I
know the processor comes off the motherboard which is good and why did
I buy a dell....