HELP! AMPEG SVT 4 PRO-NO POWER!

[Snerek]

i just tried to turn on my svt 4 pro and i can't get it to turn on at all!!

i put a call into tech support, they are calling me back..

it might be a fuse? i have no idea though?


i tired different power cords and a different outlet, and it's not that!


anyone have tips?!

[i_got_a_mohawk]

If it had been a fuse you would have generally heard a loud pop when the fuse went.

[davebungo]

The SVT-4 Pro has a resettable fuse - at least the one I've been working on does. Are you sure there is no power at all - I mean is it a case of no LEDs anywhere or just no output?

[Snerek]

it's no output power at all!

no lights come on either when i turn it on, its like it's dead.


i dont think its the fuse, cause when i push the fuse button down, its not moving which means the fuse is still good.


i had to take it to an ampeg repair shop today

[ElSTAR]

I recently had the same thing happen I think. I came back to my SVT 4 pro to find that it doesnt turn on. Nothing happens as far as lights or popping noises or anything. I dont think its the cord, and the fuse hasn't popped out in the back...

What happened when you took it into the shop? I found a place to take mine, but at $80/hr I wanted to see if there was an easy fix...

[hodgy]

There's really no such thing as an "easy fix" on these. I've repaired dozens of these and sometimes 'no power' is easier than 'no output', but it's still time consuming to get them apart and back together. I can easily spend 4-5 hours on a 4Pro before it's back together.

[Jerrold Tiers]

There's all sorts of possible reasons..... no reason to list them.

A question or two:

* What was the last thing done with the amp before turning it off the last time?

* Where has it been since then, and what has happened to it?

The very first thing to do is to look on the back and see if the circuit breaker has popped.... If so, the little lever dingus will be "open"..... push it back in.

If it resets, try the power again. Either it pops again, or it turns on.

If it pops, get it repaired, there is a problem. (could be a bad breaker, they used to be US made, but the newer chinese ones have had quality issues)

If it refuses to reset, most likely there is a problem, because the failure mode for the breaker in case of a crazy overload is to open once, and stay that way.

if the breaker is NOT popped, then anything from a wire loose, or a bad switch, onward to a more "real" problem is possible, and a reasonably decent tech is needed to determine what.

Usually, the type of problem is possible to determine from the behavior of the unit, and a few meter checks, without having to take it apart very far..... cover off, and you can see most of what you need for this type problem.

[BassmanPaul]

I had a friend who had the same problem and he phoned me. I asked him to check if the speaker cable was in place. He told me that he'd have to find a flashlight to check. When I asked him why he told me the power was out on his street!

[JimWasHere]

Welcome Elstar!

[mattliveswithou]

Have the same problem on my svt-4 pro no power, no nothing. Replaced the fuse. still nothing. halppp...plz halppp..

-Matt

[JimmyM]

If it's not the circuit breaker or a tube gone out, you'll have to get it checked out by a tech.