Amp Problem

[TC_G1]

Hello everyone,
I'm hoping someone can help me out. I recently bought a new HIWATT head and when it arrived I plugged it in, turned it on, and nothing. The led light comes on, but there's no power to the preamp tubes or the power tubes. I checked the fuses, and they look okay. I don't know much about the inner workings of an amp, so I thought I'd come here and see if anyone could tell me what the problem may be.
Any suggestions will be appreciated.

[Don Moose]

1 - edit your post (if you can) to change teh subject to "New HiWatt won't power up"

2 - blown fuses can look just fine - you need an ohmmeter to check.

3 - sounds like a warranty situation to me. If the fuses ARE bad, there's something wrong that will require opening the amp; since you're not a qualified tech, that can void the warranty. If the fuses are OK, there's something wrong that will require opening the amp ...

4- what makes you say the tubes have no power?

Hope this helps!

[TC_G1]

New HiWatt won't power up

Hi,
Thanks for your reply. The preamp tubes are not lighting up, or heating up, neither are the power tubes. The first thing I thought of was checking the fuse. I removed the fuse and replaced it with a fuse from a different working head...and there was the same issue.
I realize that in my initial post I said NEW head, but actually it was bought from a music store in Britain listing it as their "demo" model, so it's really a used head, therefore not under warranty.

[rf7]

Is the voltage set for 120V? In the UK, they run 240V.

[TC_G1]

Uh, I don't know. How would I go about changing the voltage?

[Don Moose]

There is often a voltage selector switch on the back of the amp near where the power cord goes in - look for markings like 120/240. Sometimes (rarely) there's a selector thing in the IEC jack (computer-style power cord) behind a little plastic door above the place the cord goes in.

If there's no selector, there is still often something printed on the back panel about the voltage it expects.

Hope this helps!

[Enzo]

On some things the power inlet/fuse holder selects voltage by which way you insert the fuse block.

Or it may be correct and the problem is elsewhere.

[TC_G1]

Thanks everyone! That was exactly the problem. Once I figured out how to change the voltage, everything worked fine.
Thanks again.