5+ yr old, has started partially running whenever door is closed, even with no cycle selected. By partial I mean maybe just the pump (?) because no water fills, no parts move, just a low steady hum. Water will run full cycles but not always successfully (dishes not clean). It also makes a high pitch squeaking sound during cycles sometimes but I'm guessing that's unrelated. Have tried cutting power for a few minutes but did not resolve. From other posts it seems possibly a control board issue... But haven't seen anything definitive. Thanks for any thoughts. Matt