I have a JBL model # MR-6.2 and it has started to act up. When I turn it on it is locked into one radio station mode and won't allow me to switch modes.It also does not shut off when the power button is pushed. I have had to push the reset button to shut the unit off and when I turn the power button back on the same series of events occurs How can I correcr this problem. This unit came mounted in a spa I purchased from a dealer a couple years back and they are not even sure what is causing this or how to fix it. Please help

SOURCE: JBL MR-4 CD doesn't eject

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.

SOURCE: I can't find whether or not The JBL MR-17 will

It Does Not. Only standard CDs the manual is here:.http://www.prospecelectronics.com/JBL%20MR17%20manual.pdf

SOURCE: JBL MR-17.2 not recognizing Sirius satellite receiver.

I have the exact same issue. I have swapped with two identical MR17.2 radios and swapped out the sirius receiver. No change. I even bought a remote thinking I had to have a remote installed to get it to work...still no diff. Have you ever found a solution?