its your hub.. at 200M you are right at the .9A most hubs can put out..
try going down to 196.88
Sorry, I should have mentioned. Now that I am troubleshooting, I'm running at 125mhz, just to se if it'll perk up. Doesn't matter, on the hub or direct connected to A PC, it just want start hashing.
The other unit runs fine, at 200 MHz still. Both were running for weeks with no issues until the reboot.