hub of the problem

Hi,

Got a prob. with a 2K(SBS) network, where 9 or so clients connected through
a hub.

The hub goes down at periodic intervals, which vary (at present every 10
mins past the hour!)(link lights say on). No virus on server. Multiple
(different) hubs tried.

The only way to recover the hub is to unplug/plug in the power.

Any suggestions, or need more info?

Hope u can help.

TJ.