Stihl BG56 Not starting

[tcf0065]

Hi All
I have a BG56 leaf blower which would not start.
I have changed the carburetor and the fuel lines, the air filter, the spark plug and the coil and it will still not start.
Any ideas as to what I could try next?
Thanks

 

[StarTech]

Did you bother to check the muffler spark arrester [if present] to see if was clogged with carbon?

 

[Hammermechanicman]

Does it have spark?
Have you removed the muffler and checked the piston and cylinder for scoring?