My RCA M4208GR-B 8gb mp3 player wont charge when i cut it on it says battery low and cuts off, but when i put it on charge it says battery full.

SOURCE: RCA M4018 8GB MP3 Player

Mine didn't recognize either, so what I did is go into the device manager, find the opal in the listings, double-click, disabled the device, re-enabled it, at which time it shows that there's a firmware error. I then re-installed the driver from the cd, unplugged the opal, plugged it back in, and for whatever reason, the computer then recognized the opal as a mass storage device, instead of a portable music player. The computer now sees it everytime, and all I have to do is drag and drop any files I want into the opal. Works like a charm. Hopefully RCA will provide an updated firmware program in the near future, but this might work for you for now. Good luck!

SOURCE: RCA M4018 8GB MP3 Player

mine worked then it said the battery was low but i charge it over night then it dose not turn on any more reset button does not work plug it into the computer "vista" finds it i can put stuff on it and take stuff off it tried to to get the update it just says unable to lock drivers
time to find a new MP3 player any one but Ipods

SOURCE: RCA S2001A mp3 PLAYER

i have had that problem, it says its full but it says battery low. i Just reconnected it and it went back to the white battery and finished charging. Just reconnect it, or if that doesn;t work then ur going to need more help, oh and i have the blue 2gb one,

SOURCE: Easy Rip Software

Plug your RCA M4208GR-B MP3 player into your computer with the USB cord. After the computer recognizes it.
STEP 1 click start
STEP 2 click MY COMPUTER
STEP 3 Right click the associated drive letter (i.e. OPAL) to show the option menu.
STEP 4 click "install RCA easy rip"

SOURCE: My RCA model M4208GR-B mp3/video

Go to "http://voxrightnow.custhelp.com/cgi-bin/voxrightnow.cfg/php/enduser/std_adp.php?p_faqid=2559"
To update the firmware of the M42xx mp3 player click hereand download the firmware. start the firmware and when it is runninplug the M42xx in at the same time holding down the PLAY BUTTON(center) until a white screen with a small computerwith a line going to your M42xx is displayed and then release the PLAYbutton. You can then click on start and the firmware update willcomplete,,, DO NOT DISCONNECT DURING THIS UPDATE... it may take 2 timesto complete this but it will work.... YEA!!!! WORKS with 2, 4 or 8 GBModels.....

I Tried the above...initially it didn't work, but then i tried it 2 or 3 times, and tried by connecting it while the "initializing", and then tried it after turning it off and then suddenly it came to life...just try some stuff it just might work...i.e after u download the firmware. Credit goes to the guy posted the original thing.