Marantz SR7500 headphone jack stopped working

there is no fix for people that fiddle with settings

http://firmware.marantz.eu/ Hope you know what you're doing.

Usually the headphone jack is like a mechanical switch and it's probably just not making a good connection inside. Use the correct size headphone jack and insert it then remove it maybe a couple of times and see if that fixes it.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Marantz-SR7500-Receivers-manual/id/511dj778/t/2/

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Have you tried plugging it into a different power point in your house?
If that doesn't make it stay on it is most likely a power supply issue with the receiver. More often than not it is cheaper to replace a receiver with a broken power supply than to pay someone to fix it.

The lit indication ("amp bars") proves that the aduio signal is getting through the unit's circuitry @ least to that point; lack of sound @ the spkr & headphones indicates the amplifier portion of the circuitry is either inoperative or disconnected from the load (i.e., either the speakers, or the headphones). A common cause of this type of problem cropping up unexpectedly is the headphone jack itself; in most products of this type, the audio path from the amplifier output to the speaker connection runs through the headphone jack, so the the speakers may be "turned off" when the headphones' plug is inserted into the jack. If the unit's owner uses headphones regularly, the most common problem to be found with the jack is loose solder connections to the printed circuit board's traces from the jacks' lead(s); in units with this problem whose owner's irregularly use the headphones, it's more common to find oxidization of the electrical contacts within the jack itself.

I have a POW 5 failure on a marantz sr 7500. Anybody know how to fix?

Try changing the Windows Default Audio devices

1. Go to control Panel
2. Sounds and audio devices
3. The Audio tab
4. Then change the Sound Recording Device to Logitech Headphone INPUT
   

Hopefully this will work

Sounds definitely like your jack has a short and needs to be repaired or the BB replace entirely.

Verify that the digital output is enabled. This is a switchable output. A brown-out or other power isseu may have shut it down.
Get back to us if that is not the case.
Dan