My Denon AVR-75 seems to stay in standby (red standby light is on) and I don'd get surround sound through it. How do I get it out of standby?

Here is Service Manual for help

Preview Service Manual : DENON -AVR-2500-Service-Manual Denon-AVR-2500-Service-Manual.pdf, DENON Audio AVR-2500 Denon-AVR-2500-Service-Manual.pdf (eserviceinfo.com)

The issue you're experiencing with your Denon receiver AVR-1700 may be due to a few reasons. Here are some troubleshooting steps that you can try:

1. Check the connections: Ensure that all cables are securely connected to the receiver and the speakers. Make sure that the input source is selected correctly on the receiver, and the volume is turned up.
2. Reset the receiver: Sometimes, resetting the receiver can resolve issues with the sound. To reset the Denon AVR-1700, turn off the power, and unplug the power cord for about 10 minutes. After 10 minutes, plug the power cord back in and turn on the power.
3. Check the speaker settings: Ensure that the speaker settings are configured correctly on the receiver. Check that the speaker wires are connected properly to the receiver and the speakers. Make sure that the speakers are not damaged or blown.
4. Check for firmware updates: Make sure that the receiver is running the latest firmware. Visit the Denon website to check if any firmware updates are available for your model.
5. Check for hardware issues: If none of the above steps work, there may be a hardware issue with the receiver. In this case, you may want to contact Denon customer support or take the receiver to a professional repair shop for further assistance.

Hopefully, one of these solutions will help you resolve the issue with your Denon receiver AVR-1700.

your amp needs servicing there,s a problem only for qualified technician

unplug it, let it set for about 15 min., plug it back in and see what happens. Hopefully it will recycle itself. If that fails, with your theater remote, you can pull up it's functions screen on your TV, and probably return it to factory default settings. That would be a last resort for me before seeking professional help. Good luck. . .

ok my denon avr 1804 was jamming and it shut off on standby red light flashing comes on then goes back off what is wrong ?????

Was it put into standy from the remote control and then just turned off at the wall? This can be a common cause, as it will be stuck in standby

Not familiar with this model but seems like the protection circuit is kicking in, this could be caused by an imbalance of Ohms between channels or a short. remove & check all speakers and cables for continuity or shorts, does the unit power on without speakers or in a different mode (surround off).
always add speakers in pairs (L&R) before testing to prevent possible protection circuit, test main speaker pair first then add surrounds (all according to the allowable Ohms range for the amp of course)

Try to reset the macroprocessor. Unplug the unit from AC, hold both buttons SPEAKER A and SPEAKER B and plug the cord in outlet. After display flashes several times release the buttons. No result? - repair shop.

replace all the electrolytic capacitors in the power supply. i had the exact same problem with mine and once i replaced the capacitors it powered up and stayed on and worked perfect.
these capacitors tend to fail as they're of poor quality.
this fault is very common on denon receivers, especially the later models.

hope this helps?

Finally the problem was with the HDMI cable. When I pushed it in on the TV set the problem disappeared. It seems the connections must be quite firm on the HDMI cables otherwise anything may interfere to the sound.