Help....I installed ipod interface and now there is no volume.

[ponq]

As the title says. I installed a cheap interface off ebay about a week ago, onto the stock head unit. For the most part, other than occasionally causing my ipod to crash/ lock up, it worked fine.

Last friday on the way home from a friends house. The head unit powers up, all of the buttons work, but there is no sound to the speakers.

I disconnected the interface hoping that woud clear thing up, but to no avail.

If no one has any suggestions, I would like to know at least if there is an external amp and if that could be the culprit.

I checked all of the fuses that I thought were relavent, and there were no issues there, but I did not see one for an amp.

Any help would be appreciated.

Thanks