It depends on the help that is asked for. Someone may have a understanding but can't find the issue. Some just want a full blown explanation with schematics but haven't really looked at or tried to diagnose their machine.
If I ask for help it means I am exhausted and have at least 3 or 4 hours invested and probably frustrated and need real solid help with the schematic line marked out so I can further hunt the issue down. But that is all just me and my opinion.
-Mike