Won't read the CD's now

Question edited for clarity, proper 'make model (what it is)'.

I can't find a manual, but they have a common theme. Remove the faceplate and press the Reset Button, then clean the contacts both sides with electrical switch cleaner or Isopropyl Alcohol.

https://www.premiumleisure.com/Manuals/nov07/Hydro_Spa_JBL_Stereo.pdf

https://www.rocktheboatmarinestereo.com/specs/MR18.pdf

https://www.google.com/search?q=JBL+marine+MR-15b+manual

..

3possible problem, there could be a bad reception, a loose antenna, or there was a problem on the internal resistor for antenna signals

Because of that moisture it may have fired the lighting connection inside the unit, does it produce and sound?

You will find the maual you need by using the following link :

http://www.prospecelectronics.com/JBL%20MR6%20manual.pdf

you can make one to fit where you want

yes i am a repair shop and i have had nothing but problems out of those units you might want to look into a different unit boss marine is a good choice

Will a REM 25 remote work with the MR 15 JBL radio?

The unit probably doesn't think there is a CD inside. Possible doing a soft reset will fix this. Do so by powering the unit and putting a ball point or other pointed object into the reset button opening either on the face of the radio or behind the face. A hard reset can be done by disconnecting constant power from the unit for approximately 15 seconds.
If either of these methods fail, then your unit has a bad CD mechanism or more than 1 CD inside the player. In that case, the unit will have to be serviced by an electronics repair or a local stereo shop. This is a Marine radio, and if installed on a boat, this problem is not too uncommon. Moist air can cause damage to the unit as well as the bouncing on the water that boats do.

Hi I have a spa with the MR4 sterio and i want to remove it can you help as i am unable to remove it , the front comes of and i can not see how the rest comes out .

Hi,

Initially, have you tried a full hard reset? The reset button is at the panel at the back of the faceplate, bottom left side. Of course doing so will also erase all presets and user settings & configurations.

Additionally, pls verify that the multiple contacts pins are clean, free of corrosion and makes a positive contact with its mate at the rear of the faceplate. If the unit is used in a salty environment, it may be necessary to manually scrape of whatever blue green build up develops between the connector pins and the plastic insulator. You can try using an old toothbrush and WD40.

Further to check are:
1. the red, yellow and black wire are tightly connected where they are supposed to be connected. If the unit is used onboard, it might be to your advantage to likewise check the grounding system;
2. one of the rear connector is for a remote, pls likewise check that none of the pins are shorting and no presence of any corrosion.

If problem persists, it may be necessary to seek the services of a qualified professional as this involves opening the unit up and tracing the circuitry of the logic/controller circuit.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

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