LCD not working consistenly

[mboehler]

It's working properly again now, but I don't know why.  I did not take anything apart or otherwise make any changes or adjustments to the  machine.  I did read somewhere else that someone found that when using plastic resin vats instead of the metal one, it worked for him.  I purchased 2 plastic resin vats and it started working.  Strange.  The even stranger thing is that when I use the metal vat, it continues to work.