No sound coming from Blues Jr.

[io256]

Please, could anyone help me?
I have a Fender Blues Jr. amp which I haven't used for a long time (a few years).
I turned it on today I couldn't hear no sound from the Amp. (When I turn the volume up, the speaker seems to get loud but no guitar sound out)
What could be the problem? or Any solution I cound try?
Thank you

[mac1amps]

Your problem is most likely either a bad input jack (those jacks are SO cheesey!) or the jack has broken its solder connection to the P.C. board.

[io256]

Amp or Guitar input jack?

Dear mac1amps

Thanks for the quick help!

Do you mean the input jack on the amp, not the output jack on my guitar?
I will try it on another guitar when I get home (if it means guitar output jack).

Can I just re-solder the input jack to fix it? (possibly replace with the new input jack)

(or if ever) any other possible causes?

[mac1amps]

I'm definately referring to the input jack on the amp. Sure, it's POSSIBLE that it's your guitar jack, but much more likely it's the amp jack (like I said on my first post, the jacks that Fender uses on those amps are very cheesey. Then again, I don't know what kind of a guitar you're using. If it's a Fender [for instance], I would take an educated guess that your guitar jack is fine). As far as whether you should do it yourself, it all depends on how comfortable you are with the dissassembly/ re-assembly process, AND how experienced you are with soldering (not to mention, have access to a DECENT soldering iron, not some cheapo 30 watt iron). I've been an amp tech (by profession) for 33-years, so it's all second nature to me, whereas alot of "do-it-yourselfers" don't realise the importance of good, "clean" soldering, and/or the many possible issues that you can encounter during the dissassembly/re-assembly process.....good luck...........(Mac)

[tonezoneonline]

Mac1amp is on the money about the cheesy input jacks on those amps.Most I have seen break loose from the PC board.Some just break.The board has to be removed and flipped to fix this problem so if you don't feel comfortable doing this take it to a tech.I generally hard wire a switchcraft jack in the blues jrs and the hot rod amps that have these jacks.

[tim]

They also use very cheesy pots (phenolic/plastic back) which crack very easily if the knob is hit hard enough on the top. I've replaced many of these pots. Unfortunately, I can't seem to find any "drop in" fit pots that have a metal back on it. They would be less apt to self destruct if hit on top of the knobs.

[jsevy]

Similar problems, have me stumped

I have a Blues Jr. on the bench right now with a similar issue. The input jack did appear to be broken and that was the first place I started. It seemed to fix the problem, but the guitar just faded out. There is a bit of guitar that comes through the reverb. There is something intermittently wrong between the input a(first stage) and the power amp input. Has anyone heard of anything like this before?

[Enzo]

Circuits are circuits. APply a signal and see where it disappears. Are ALL the heaters glowing?