1GB Express FM stopped working

[H2OKiter]

Got a Sansa Express 1GB on ebay to replace my broken original one. Had to do the Micro-SD card rescue to get it going, but after that it worked fine for maybe a week. Then one day, right at the end of a program on NPR, the FM just stopped producing sound. Thought it was the station 'til I tried others. I can select FM, scan stations, adjust volume, etc. normally - just NO sound whatsoever. Switch to music and sound is fine. Anyone familiar with this problem? Any advice on a fix? Thanks in advance!