I just recently purchased a Frontman amp about 11 years old . It started to blow fuses then a very loud buzz without any input no output. Is it worth the fix?

sounds like bad caps and maybe a failing output transistors. Use Deoxit contact cleaner too.

Find another speaker to check it with. I've had several fender amps to blow their speakers during loud playing.

Why was it on for over a year :D Has anyone replaced the fuse? In the service manual I found it has to be only 2 Amps! Okay let's solve the problem. The power transformer was overloaded which caused the broken winding. It is still overloaded what can be heard by the hum sound. First thought was to check main capacitors or better just replace them! If the hum gets louder, they might also become warm. Check voltages after bridge rectifier and smoothing circuit. They should be +/-42 V (TP3, TP4) and +/- 16 V (TP5, TP6) Let me know which of them is faulty Cheers

... do you, by any chance, have non humbucking pick ups on your guitar? Just curious...

It sounds like one of the preamp valves is faulty or other components in that area of the circuit causing a positive feedback loop which is generating the noise. You need to take it to an authorised Fender repairer in your area. Whereabouts are you?

There is something resonating with that note frquency. Often the grille or wiring inside will rattle at certain frequencies. You need a sustained source of these frequencies to find what is causing the noise.

You MAY be overdriving the amp. This is a tiny amp and should NOT be played louder than a typical BoomBox or the speaker may be driven too hard, going non-linear and then buzzing.

It is happening because you have a ground loop. You need to check the ground on your amp. If it is an old one that does NOT have a three wire cord, you need to have that changed. Failure to do so could also damage the interface. ALL your equipment, computer and guitar am should be powered from the same receptacle. If you have other devices connected to your laptip such as printer, they too MUST connect to the same receptacle or plug strip. Any phone lines should be disconnected from the laptop. Make sure everything has three wire cords. The interface probably sends out line level, so you should use a low gain input of the amp and use very little gain as the interface probably has 20 or more Db output than a guitar.

The power amp input jack takes "line level" input BUT is monaural (single channel). The output of an ipod is Stereo. Hence you would have to "mix" the two channels before connecting to the Fender. Mixing does NOT mean just tying the two channels together. A minimu thing would be a passive resistive mixer consisting of a resistor from each of the IPOD channels to the common point going to the input of the Fender. Remember if you plug into the Fender power amp input you DISCONNECT the preamp and other circuits and would ONLY hear the IPOD input.

If you are saying that you are plugging a guitar cord into an input on an amp without the guitar on the other end and you are getting a hum or buzz with the volume turned up ; that is normal. If you are getting the same results with a guitar plugged in it means the ground wire to your output jack on your guitar is broken. Check your cord with a volt ohm meter for continuity on the tip on one end to the tip on the other end. Do this for the sleeve on one end to the other. If you were getting the buzz without a cable it would mean that your input jack in your amp has a broken ground connection. Hope this helps.