My HH sound is very distorted. The best way to describe it... it is like a distorted tempo. "Pop, pop, pop, pop" all the while the game sounds and music can be heard at a low volume but also distorted. On the sound/speech board is a 74ls138 chip at U4 thats legs look pretty rusty/black. Would that have anything to do with it? U4 is a device select associated with the speech chip which HH does not have.