I'm experiencing a similar problem. What version of minepeon and cgminer are you using?
I'm using what HF shipped me:
- MinePeon Version: MinePeon 0.2.4.3
- Miner Version: cgminer3.9.0h2
Once I find some free time I will try a different USB cable, upgrading to 3.11 and reflashing the SD card to see if any of these options help.
I reflashed the SD card to 0.2.4.3 and it's stable. When I tried to update to cgminer 3.11 on 0.2.4.3 it crashed after a few hours and so did Minepeon 0.2.5-pr1, even when I had the clock speed set to default.