I have an ultimate amp T3500D and the ultimate logo does not turn on how ever the amp works and both the temp guage and volt guage works. I removed the amp from my car too see if it would be something in the car that is causing the problem but it does the same thing when i hook it up to a different power supply. When I turn the amp off the logo blinks red and so does the protection LED. What can I do to fix the amp.