I recently acquired a 1985 Concert II (1x12).... It's an absolutely amazing amp. I have no problems with it other than the fact that I tried plugging a second cable into input 2 while I had my instrument plugged into input 1. The amp simply died and wouldn't power up until the next day. I was freaked out, because this shouldn't happen, and my amp tech thought this shouldn't have happened. I haven't done it again since.

Has anyone had the same problem, or is this clearly an issue with my amp that I have to resolve. And if this is the case, does anyone have a sense (guess) of what the problem might be?

Thanks very much in advance!

Nick

Your tech is right , this should not be append . Plug cable in the two input should not switchOFF the amp. Or it have something wrong in the amp close to inputs jack doing a short with 2 input in use.

A look inside the amp will resolve the problem.

Remove chassis from the cab and look close to the inut jacks , if not sure if something wrong , send us clue-ip photos.

I'm new to this forum and don't see anywhere how I can post a picture... I just snapped 3 pics of the inside of the input jacks. If someone can please help, I'd appreciate it. I could also send the pics to an email address of a user that thinks they can tell what the problem is by just visual inspection. To me, I don't see anything obvious.

Thanks,
Nick

OK.... I took the risk and plugged into both inputs... No problem now, but I'm still wondering why it shorted out the first time I did this a couple weeks ago.

Or your power wire wich go to wall oulet is defective ; intermittent ?

Or you touch power switch ...... ???

For photos

1- Go to photobucket
2- dowload photo there
3- Put your arrow on the photo (you like to download on Fender Forum ) , a new window appears
4- Copy IMG code
5 - Put that on Fender Forum answering window

I own an '84 Concert II (2x10 Model) and this most certainly should NOT happen. I suspect you may have a loose input connector. By the way, I plugged two guitars into both my inputs and both worked...although the clean channel was quieter volume wise.

I even went through my instruction manual just to make sure I hadn't forgotten something or some wierd trick like this, but nothing.

Have your amp tech check it out.

T2

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T2, thanks for your feedback, much appreciated... I will have my amp tech take a look, he's a wizard on tube, and SS amps for that matter.

Nick

stratele52, thanks for the instructions... I'll try with my next post to upload the pics.

Here are the pics of the input jacks...

The input jacks look fine to me, but can't really tell if they are loose. Try a little Deoxit on them, if that don't clear it up, do take it to your tech.

Am I missing anything here guys?

T2

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What time is it? It's Fender Time.

I think that problem is in powering part. I had slightly the same problem with my twin reverb last month. But not like you it turned off when I'm just playing. I take it to my tech and the problem was the power cables inside. They loosen up and he fix.

Hope it is not a major problem.

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