I am looking for suggestions as to where to begin on servicing this receiver.It powers up for a short period.5 seconds or so, enough to initiate a system's test of sorts then powers down to a standby mode. Any help would be appreciated.
First place to look is for open fuses. Next, does a relay click, and then the unit depowers ? If so, primary of main ( not standby ) power transformer may be open. It's quite common for primaries to fail open on Denons of various models. Fault monitoring circuitry checks rails after main power relay closes, and if any ( or all ) are missing, unit drops back to standby. Failing this, it's going into output protect. As Mark says, you might struggle, particularly with a Denon, if you are not an experienced engineer. They are not the most fix-friendly of designs ...
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