My son has a DM6 set up, (several years old). Recently the sound has started dropping out, after a few minutes of use. He does not use it for anything extravagant, he just plays the drums. When you first turn it on, it seems to work fine. All of the icons light up when you hit the drum/cymbal heads, and the sound is fine. However, within just a minute or 2, the sound goes away. The icons still light up indicating a recognized strike, but there is no sound to go along with it. He loves this set, and honestly I don't have the money to replace it right now. Any ideas? Thanks in advance for any help you can give.
S