[stainless]

I have recently bought a new Panasonic widescreen tv and as a result, had to refit all the leads for into my Yamaha AV Amplifier.

I had some problems with the speakers and in trying to sort this out, I have switched the impedance switch into a different position whilst the power was on.

Now, when playing a dvd, my amp cuts out and goes to standby when there is any slight increase in volume on the soundtrack. The manual says I should check the impedance switch is fully on. It is, and I have tried it in both positions. However, in the 4ohm position, the unit switches off immediately. In the 8ohm position, it cuts out on the increase in volume.

Have I damaged the impedance switch and is this the cause of the current problem? If so, is it easily fixable?

[clockworks999]

Do you get the same problem with all sources (TV, DVD, Tuner, etc)?
If you do, it could be a problem with the speaker connections, maybe a partial short circuit. Try disconnecting the speaker leads from the amp, and increasing the volume.

If it still cuts out, try disconnecting the inputs to the amp one at a time.

There are really only two possibilities:

You've blown up the amp
You've plugged something in wrongly/badly

The second is the most likely on a modern amp. The protection circuits usually prevent damage. They shut the power off if there is a problem, which is most likely what is happening here.

Cheers
Steve