[App_rpt-users] ASL error / problem

I downloaded and installed the latest ASL file, and booted the Pi2. My repeater works for about 24 hours. After that, the RA-42 URI green light begins a weird pulsating flash, and the audio becomes garbled. Following earlier suggestions, I increased the Pi supply voltage from 4.9v to 5.3v. I tried a DMK URI. I re-installed ASL on another card. Nothing helps. Nothing of help in the log files. Any suggestions?