Had some passwords expire, and this knocked out my OEM (11g, SE). Cleared this up, so that SYSMAN is not locked or expired (nor is DBSNMP, SYS, SYSTEM, all of which may or may not affect OEM, depending on various sources).
emctl start dbconsole gives me "failed" every time, and points me to a log directory containing a pile of stuff, where it's not obvious where to look, and where there are errors all over which may not be the error.
Tried various things on Oracle forums, but it seems like what I really need to know is, what is all this log information so that I can find a unique search string on the proper error? I'm lost and not sure where to start.