Onkyo services manual

Here is service manual for your help. See the pat reference on IO Board and compare it with service manual.

ONKYO TX-DS797 SERVICE MANUAL Pdf Download ' ManualsLib

I did find your Service Manual

https://www.manualslib.com/manual/1150671/Onkyo-Dv-Cp702.html

Lots of help here on Fixya from 2008 with the reasons.

https://www.fixya.com/support/t474556-onkyo_dv_cp702_will_not_load_any_disks

Nothing on Service Bulletins

https://www.google.com/search?q=onkyo+dv-cp702+service+bulletin

..

Request the service manual directly from Onkyo.

Here is the user manual https://www.intl.onkyo.com/downloads/manuals/pdf/ht-r393_manual_en.pdf
First thing to do is to disconnect everything from the received,, and take it to another AC outlet to plug it into, and try again.
The unit does not have an external fuse, and it is not recommended to open it.
Here is the service manual for qualified persons https://www.vintageshifi.com/repertoire-pdf/pdf/telecharge.php?pdf=Onkyo-HTR-393-Service-Manual.pdf

That information is available in the service manual which you can find in the link I've provided below. ONKYO TX 870 TX 870M SM TUNER AMP Service Manual free download schematics...

does it do anything when the power button is pressed? any relay clicks? front panel lights?

i need a manual service for onkyo tx-sr313

Go to Onkyousa.com, move mouse cursor to support, click on owner's manuals, click on receivers, click view archived receiver models, click TX-SR606 (both"quick setup" and "HTS 7100 for the full manual").

The amp protection circuit has been activated. Remove the power cord from the wall outlet immediately. Disconnect all speaker cables and input sources, and leave the AV receiver with its power cord disconnected for 1 hour. After that, reconnect the power cord and reconnect an input and a pair of speaker wires onto the unit. If the receiver still does not turn on than you will have to bring it in for service. Turn up the volume and if the receiver doesn't shut down, power off the receiver and add another pair of speakers. Power up the unit again and turn up the volume. If it doesn't shut down, power off the unit again. Now connect all your input sources and turn on your receiver. If the unit shuts down again, your unit will need to be further serviced at an authorized Onkyo service center.

To obtain service, take or ship your Onkyo product to an Onkyo Authorized Service Center. Please also include in any mailing a contact name, address and telephone number. Please include a copy of the original sales receipt/invoice as well as a letter stating what the problem is, with your name address and phone number so the service center knows who to return the unit to. Please note, before shipping, you must contact the authorized service center to inform them that you will be sending your unit in for repair.

There's a fre service manual here, you need to join tte site (free)

Onkyo TX SV727 Manual AV Control Receiver HiFi Engine