You'd better download some more recent Agilent service manuals. Its module level if you are lucky:
http://cp.literature.agilent.com/litweb/pdf/54139-97014.pdf
http://cp.literature.agilent.com/litweb/pdf/54709-97013.pdf
Well, the first one if for the dreadful Rigol 1000 Series scopes that Agilent has relabelled, so well done for picking a 'service manual' for an item made by the company that has been criticized for the lack of proper service manuals. Since all it does is to say that if there are problems with the scope then send it in for repair it's exactly the level of guidance I'd expect from companies like Rigol.
And the one for the DSO-X4000 (which has actually been developed by Agilent) may not contain extensive components list or be as detailed as for older gear but it still contains board drawings and test/adjustment and failure localisation procedures, which, considering that this is a low end scope with a single highly integrated PCB (with many components you can't buy individually anyways), means the manual still contains lots of useful information for trouble shooting.
It's clear that, with higher integration, there will be less things that can be fixed without access to special tools and components. But there's still a difference between at least giving some flow charts and test procedures to isolate where a fault might be located than spending several pages without actual technical content just to say 'if broken send it in for repair'. So you've actually proven my point (that the manuals from the big names like Agilent are much more useful than what comes out from Chinese vendors like Rigol).
You keep repeating that... If you buy it from a local Rigol seller (which aren't hard to find) then that is where the support comes from. Let them talk to the Chinese.
So your local Rigol seller actually fixes your scope (of course he has all the equipment, doesn't he?), writes new firmware or produces proper documentation? Certainly not.
And this aside from the fact that your reseller may not be there any more in a month or two (especially in today's economical climate that's far from impossible). And then?
You keep on banging about your Rigol seller but quite frankly, if you believe that this equates proper manufacturer support then I'm sorry but you're delusional.