I have a 300 disk DVD changer, Model DV-M301 manufactured in 2000. I need the codes for the Onkyo remote RC765M. Can you refer me to a manual I can order on line?

Hello Chris, did you test if the remote cotroles emit?
to test take the cell phone, put it in camera mode and point the transmitter of the remote control at the camera and press the buttons, every time you press you should see a light on the transmitter of the remote control, if you do not see it, the remote control, it does not work
There would be another test to perform, only if you have an Onkio Receiver, with control output on the back panel, if you have it, you have to place a 3.5 mm Miniplug cable to the 3.5 mm Miniplug, from the DVD player to the the Receiver, this can be seen on page 19 of the user manual of your Onkyo DV-CP702 DVD, with this connection you use the remote control of the Receiver to control the DVD
I hope you can solve the problem
Greetings Franco Dosil

Hola Chris, probo si los cotroles remotos emiten?
para probar tome el celular, pongalo en modo camara y apunte el emisor del control remoto a la camara y presione los botones, cada vez que presione tendria que ver una luz en el emisor del control remoto, si no la ve, el control remoto, no funciona
Habria otra prueba para realizar, solamente si usted tiene un Receiver Onkio, con salida de control en el panel posterior, si lo tiene, tiene que colocar un cable Miniplug 3,5 mm a Miniplug 3,5 mm, desde el reproductor de DVD hasta el Receiver, esto lo puede ver en la pagina 19 del manual de usuario de su Onkyo DV-CP702 DVD, con esta conexion usa el control remoto del Receiver para controlar el DVD
Espero que pueda solucionar el problema
Saludos Franco Dosil

https://www.intl.onkyo.com/downloads/manuals/pdf/dv-cp702_manual_e.pdf

The remote for your DVD is available from e-bay and Amazon. Universal remotes can use several codes for the same manufacture some are the same.. Usually for a manufacture there are more than one code. try all checking each one.
Amazon com Samsung 00093G AH5900093G Remote Control Home Audio Theater

Hope this helps?

What is the model number of your receiver so that I can advise you of the correct reset procedure, you can email me at [email protected], thanks, JT

If you turn the remote over there is a tab at the top push that towards the bottom of the remote and pull up. Once you have the battery cover off replace batteries with two AAA batteries. Click below for a copy of the manual. The battery replacement is on page 9 of 40 in the adobe document.

Onkyo DV-SP301 Manual

This should help you.
http://codesforuniversalremotes.com/samsung-blu-ray-player-remote-control-codes/

Hi

As per its user manual you cannot play back discs such as VCD (VIDEO CD) ,CD-R, CD-RW, CD-ROM, DVD-RAM, DVD-RW, etc., even though they may be labelled . Please refer to Onkyo DVC600 User Manual for more information.

Please do rate the solution as FixYa and revert for further assistance.

Thanks
Rylee

Region code hack posted by Victor Lazlo, July 14 2003:
Steps to change Region code:
1. open setup menu (with setup key)
2. select menu point 'General' (dt. 'Allgemein')
3. select sup-menu point 'Setup-Menu Mode' (dt.Setup-Menü-Modus)
4. at 'Setup-Menu Mode' select 'basic' (dt. Einsteiger)
5. confirm 'Basic' sellection with 'Enter' key
6. now push 'Display' key at your remote control, the present regent code will be displaid
7. to change the region code push 'Condition Memory' key (COND.M) at your remote control, afterwards a number key representing the region code you want to select
8. after a successful change, the disply of ther regional code will disappear
9. if pressing the 'Disply' key again the changed regional code will be shown.

Remark: Macrovision copyguard in gerneral will be switched off after that modification

refer to:http://www.videohelp.com/dvdhacks

you could try getting in touch with the manufacturers of the receiver,or if you have a code in its manual for a sony dvd,you could try that as that all blueray is,it might not matter about model of dvd.

One of the two things might have happened:
- The IR sensor got covered - by some reason
- the IR sensor talks to a small controller back - which is not working at all.

Multi-Region Hack:

Press the Open button on your Onkyo DVD-player to Open the drive tray.
Using the remote press 9, 9, 9 and 9 on your remote control.
Press the 1 button on your remote control for region 1, 2 for region 2, and so on, or 9 for multi-region.
Press OK and the tray will close.
Reset the unit by powering Off and then back On again.