[mythtv-users] Electrical power in my cable line? Is that bad?

[Yann Lehmann]

Brad DerManouelian wrote:

> Whomever installed your cable never bothered to ground it properly. Your 
> choices are to have them come back and do it correctly or ground it 
> yourself if you know what you're doing. Sadly, it happens more often 
> than you would think. Someone mentioned not long ago that they fried 
> their motherboard by plugging the firewire cable from their ungrounded 
> set-top box into their machine. I nearly blew up my PVR-350 when I first 
> got it because of the same problem. The tip is still a little black, but 
> surprisingly records just fine. :)
> 


Is there an easy way to check if the cable is grounded properly ?

Thank's

Yann