Mistake setting up player

Press and hold the Play button until the player turns on.
After the Welcome screen the Main Menu will appear.
Press the PREV/NEXT button to select the Setting mode.
Briefly press the Menu mode button to enter the Setting mode in order to view or change the setup of your system.
Select the [EN] icon (the first icon on the first row).

Hello
Setup code for RCA with Philips SRP2003/27 is:
2351

[1] Make sure the receiving device is able to

respond. E.g. when you try to repair the Play

key for your DVD player, make sure to insert

a DVD into the DVD player otherwise the
Play key is not able to function.

[2] Select the device

that you wish to

operate (e.g. DVD).

Press the (DVD) device

selection key to
select DVD.

[3] Keep keys (1 & 4) and

pressed

simultaneously for 5
seconds.

The red Setup

light lights

up. The remote control is now in setup
mode.
8 EN

[4] Press and hold the key that does not

function and immediately release it when

the device responds.

* If the key still does not function as expected,

try pressing it again for a longer period of
time.

[5] Press the (DVD) device

selection key twice

to save your settings

and exit setup
mode.

When no key

is pressed for 5 minutes or more, the

remote control will exit setup mode,
automatically saving all your settings.
OK.

Hello
I thinks that you haven't its user manual with you now. If have, refer to it. All the proceedings are there. If you haven't one, either send your Email address to me by Fixya, or get into the URL I've given below, where you can download the maual of your set as Adobe PDF document. OK
Wish You Happy Easter.
www.retrevo.com > JVC Manuals > JVC DVD Players Manuals

hi,
make your player region free by the following simple setting.
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1.Press Home button

2.Press SETUP

3.Select Padlock Picture (4th Down)
"Do not enter the menu just stay on the padlock picture"

4. Push 0 seven times

A message will say Region Free mode entered Push Yes (enter button)

ok

Please press the DISPLAY when the player is in stop mode.
The Control Menu appears.
Press the up/down arrow to select SETUP, then press ENTER.
Press the up/down arrow to select the RESET and then select Yes from following message.
Press ENTER.
It will reset the player.

I wish I could find the website that gave all the repair hints for this DVD player, but I downloaded the info, and can no longer find the site. Here is what it says with regard to your symptoms. I hope this helps. I have done all the mods the site suggested, but continue to have difficulty with the remote, tray opening, etc. I have 2 machines and used to love them, but frustration has taken it's toll. Recovering from a condition with no TV picture
Accidentally switching to PAL and getting a rolling black & white picture happens all the time to baffle users, especially on models with a System or P/N key on the remote. To get back your color and sound just switch to the proper system in the menu or put in a movie of the correct type and it can switch automatically or try the procedure below for resetting to the defaults.
Sometimes owners will accidentally switch to Progressive Scan in the menu then get no picture at all. You can fix the no picture condition on the CH-300 by resetting the defaults to interlaced as mentioned in the users manual:

"To reset the VIDEO OUTPUT, turn Off the player, turn back On, open the disc tray and press and hold the Stop button on the player for 10 seconds to reset the scan mode."
The Reset procedure doesn't seem to work on all versions but you can sometimes get a usable B&W picture allowing you to get to the menu and change the settings by connecting the composite video input of your display to the Red Pr/Cr or Green Y component output jacks on the rear of the cabinet.
You can also go into the Menu and set it blind with the following key presses on the Remote:
1. With the unit Stopped, press Setup.
2. Press Enter.
3. Press the Down Arrow 3 times.
4. Press the Right Arrow Once.
5. Press Enter.
On 300Z & 300ZS models if the video is set to Progressive Scan and you can't get a viewable picture on the Red or Green jacks try going into the Menu blind and changing it back with the following key presses on the Remote:
1. With the unit stopped, press Setup on the remote.
2. Press the Right Arrow Once.
3. Press Enter.
4. Press the Down Arrow 2 times.
5. Press Enter.
6. Press the Up Arrow 2 Times.
7. Press Enter. This should switch it back to Interlaced scan with S-Video and Composite output.
To change the Parental Control setting on the CH-300 use the factory password of 3351. For the CH-400 use 1379.

hi! press the audio setting and set on the audio set on

Hi there!

With the CH DVD300 powered on,you might want to try pushing the stop button on the unit itself for about 20 seconds. That should reset the DVD player to default settings. It worked on mine.

it mey be change invideo out put has been changes i.e. ntse or pal mode to changes that mode on remote threr is p/n switch

I think I had switched to the PAL format by mistake. Fixed the problem by buying a new DVD player, was cheaper than the factory fix.