Problem with Bose Sound Dock - Please HELP!

Newbie here. Hi to all.
I'm experiencing a slightly annoying problem with my Sounddock. I bought one last month and didn't open it for a couple of weeks as I was moving houses.
When I finally did, I plugged in my 60gb video iPod only to notice a high-frequency hiss appears after about 30 mins of use. Now if I remove my iPod, it disappears, but reappears as soon as I plug it back in.
If I unplug the Sounddock for about 10 mins, then it takes about 30 mins of use again for the hiss to appear. I have the same problem whether I dock in my video or my nano. I've used my video at a friend's who also has a Sounddock, and the hiss did not seem to appear there.
Now it could be a faulty unit, which is why I had the Sounddock exchanged last week, but the hiss is back. The Sounddock is placed away from other electronic appliances.
Help, this is actually driving me nuts!
Many thanks.

 

Had the Sounddock exchanged for a third time, took it to my office to test it out, and I've realized there that the hiss actually comes from the power transformer! This could be caused by a power surcharge... Any other suggestions?

 

i havent had any problems with my sounddock w/c was given to me last year. i have to watch out for these then,

 

Speakers that won't play: Completely Useless.

I'm also having problems with the sound dock and would appreciate any help. I quite literally just bought it two days ago. It worked like a dream for a day and now all of a sudden it's not playing a thing.

The ipod is plugged in. I don't believe it's a problem with the ipod as I tried both my nano and my 15gig and neither one is working. The ipod appears to be playing (ie - the tracks progress and the timer shows the song is going- just no sound) and it appears to be connected/docked properly as it charges just fine. However, no sound.

The remote also seems to not do anything anymore. I was thinking perhaps I killed the battery (in a day? is this possible? granted I flick through music a lot, but still... that's a shoddy battery life if that's the case) but shouldn't the dock play music regardless of whether or not it is controlled by the remote or the ipod controls?

Anyone else have similar problem? I'm not sure what else to do as there isn't a heck of a lot of options with this thing...

 

Have you called the Bose customer service.

To follow up on my previous post, I called the customer service, and explained my problem. They sent me a new power brick via UPS, which is different in format (longer than the one that came in the box)... So far so good, the hiss has disappeared. I've only had it plugged in for about 45 mins now, but in relation to past experience, that's already a huge improvement. I'm just hoping that it will stay that way now.

A friend of mine bought a Sounddock at about the same time as I did, and he seems to have the same problem, although he doesn't seem to be quite as sensitive to it as I am.

 

bose sound dock has knocking noise

Sudden knocking sound now happening; any ideas why/