Frozen screen RCA M4208RD-B (OPAL logo +word "Intializing")

Try to reset the player see if your model has the small hole on the back or close to the usb port. Press the tip of a paper clip into the hole and cause the player to reset.

Consulting the RCA site gives next steps for initializing screen:
Step 1: Disconnect your Player
Step 2: Reset your Player

1. If your Player uses AA or AAA batteries, remove them from the Player
2. If your Player uses an internal battery, press and hold the POWER button for 10 seconds

Step 3: Hold down the PLAY key on your Player and connect it to the PC via a USB cable.

Step 4: Release the PLAY key when a progress bar and text, "initializing" appears on the Players display. If you cannot see the "initializing" text, please disconnect your Player and try again.

All support for Opal M4001 on this site:
http://support.rcaaudiovideo.com/product.aspx?product=187
M4001 manual:
http://www.voxxsupport.com/images/manuals/M4001/media/M4001_UMEN.pdf

Just post a comment when needing more help.

This is a very common problem with the RCA Opal.
You need to goto the RCA website and download the latest firmware.
http://www.rcaaudiovideo.com/product.aspx?product=408
Download the firmware from there. Plug in your mp3 player. (don't worry if it cant be found bye the PC it will when the firmware installs)
After the mp3 player is plugged into the usb device of your pc install the newly downloaded firmware. And it should work fine.

I had this problem. I had to really try several different things to get the software to recognize the mp3 player. RCA does have download software that will format your MP3 player and put the firmware on the player. It would be better to get the firmware on without formatting if you have files already on it. Just be sure that you get the screen that shows it is connected to USB.

If it's anything like the opal M4002 then on the back of the player there will be a small hole into which you can insert a small implement (like a toothpick) and press the reset button.

Download the firmware again.
after its download get the firmware you just download and install that one. Make sure mp3 player is hooked to your pc.
Go to add hardware.
Have windows look for MTP device. while the firmware is installing.
after its installed leave it hooked to pc for about 1 hour to give it a little charge. You should see a new folder Opal.
Let me know if that helped

3 different ways to solve.
Some players have a reset on back.(its a small little hole)
Hold the reset down with a pin for 15 seconds.

If that don't work hold the power down for 15 seconds.
If that don't work.

Go to the RCA website.
http://www.rcaaudiovideo.com/
download the firmware there.
after firmware is downloaded
hook mp3 player to usb device of computer
Install the new firmware.

The player reports that it is full.
•
You have filled the capacity of the internal
memory of the player.
•
You have exceeded the maximum number of
items that this player supports. Your player can
only support up to 2000 media files within eight
hierarchy of folder in maximum
RCA M4208RD User Manual Tips And Troubleshooting

Your firmware went bad.
Just got to the RCA website.
http://www.rcaaudiovideo.com/
search your make and model
download the firmware.
Then hook you mp3 player to usb device of your computer.
After mp3 is hooked to computer
Install the newly downloaded firmware.

Hey all you opal owners..had mine since x-mas and believe it or not even with the glitches it has i love it plus i have the 8 gb one ..anyway had the same problem wouldnt get past initalizing screen..could not re set it either so what i did was...left it on until the battery went down once battery died i turned it back on you will get that low battery screen shutting down and not the intializing screen so right before it did actually shut down i plug in the usb chord and what do you know it recognozes it and then i just upgraded firm ware thats where the problem is you have to upgrade ever since i have done that its been fine..also when playing songs dont skip song to song so fast or it will lock it up