After 12 years of use one of my crown xls2500 start some problem.when i push the power button amp starts all relays click but no sound on speakers.after about 20 seconds all the bar leds start blinking for 3-4 seconds and relay click ones.then i have sound on speakers and the amp going on for hours without problems.can someone give me advice what causes that?or someone have the same experience with this very popular amp?i have all ready do some troubleshooting desolder all relays and checked then check all relay diodes all ok.capacitors is all new change 2 years a go.thanks for any help.