I've got a class D 400 watt amp. Basically, the amp won't get power. Randomly, it will turn on for like 10 seconds and then turn off. The protect mode isn't coming on or anything. The ground is good, etc. The problem started happening when the power cord came loose. I plugged it back in and the problem began. I went out and installed a ring terminal. All the fuses are good, etc. It had worked solidly for about a month prior to this.