DENON AVR-790_AVR-590_AVR-1910_AVR-1620_AVR1610 _ POWER SUPPLY TROUBLESHOOTING TABLE _ NO POWER

NO POWER ON

Is the ON/STANDBY indicator on the front panel flashing red?	No -->	Are there any incomplete connections in the connectors connecting between the various circuit boards?	No -->	Is there a short circuit between the speaker terminals and the ground?	No -->	Correct the short circuit between the speaker and the ground.
Yes		Yes		Yes
Is the fuse blown?		Connect the connectors properly		Check for damage in the power amplifier circuitry parts and replace any defective parts.
Yes	No -->	Refer to Fuse is blown
Does the power turn on when the POWER switch is turned off then back on?	No -->	Is a DC 5V voltage being supplied from the POWER B’D (CN1701 pin 4) to the microprocessor?	No -->	Is a DC 5V voltage output when the cord supplying the power from the SUPPLY B’D to the microprocessor (CP1700) is unplugged?	No -->	Check the parts from IC1703 to the primary circuitry and replace any defective parts.
Yes		Yes		Yes
Check the primary circuitry parts including the POWER switch (for poor contacts, etc.), and replace any defective parts.		Check the microprocessor periphery circuitry and replace any defective parts.		Check the circuitry and parts from CP1700 on the SUPPLY B’D to the microprocessor for damage and shortcircuits, and replace any defective parts.
FUSE BLOWN
Check for leaks or short circuits in the primary side parts, and replace any defective parts.	Check for short circuits in the rectifier diodes and circuitry of the secondary side rectifying circuits, and replace any defective parts.	Check for short circuits in the power stabilizer unit's regulator output terminal and the ground, and replace any defective parts.