Totally dead Texas Star DX667V Amplifier

Question

I have a totally dead Texas Star amp that won't even light-up.I have checked both fuses & the big diode diode that crosses both hot fuses.I also took the big diode outta line,& no power.Could someone please tell me what to check next?I also don't see any burnt foil traces.It has 2 fans added to the CW key that are hooked up to the 2nd button,that won't come-on,either.Thank-you!