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I have a Ibanez TBX150H head, when I turn it on all I get is a buzzing noise coming through the speakers. Nothing drastic happened to it, just one day it wouldn't play.
Re: I have a Ibanez TBX150H head, when I turn it on all I...
Most common cause would be failed filter capacitor(s). Broken grounds neaar the input connector are another common problem. This will take electronic troubleshooting skills.
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I would try a different guitar cord to prove that the one you use is good. If the plugin socket is rusty or corroded it could do the same. If you use a speaker cable as an instrument cable, that would happen. A loose ground can also and cheap pickups will do it naturally. I know an S series should have decent pickups but, if you got it used or something like that, you never know what was done to it before you got it.
This would only mean two things: 1. you have a bad capacitor in the circuit or the grounding on the circuit is broken and not filtering the obvious line noise from the circuit.
2. You have what is called, dirty power. That is when you have some kind of electrical device plugged that generates line noise which can be even a florescent light as they generate line noise.
Please take the following steps to narrow down the issue.
Take your setup and plug it in some where you know others can setup their rigs and it is using clean power. If, the humming goes away then it is dirty power where you originally setup.
If, it is still humming then you will need to take your equipment to a qualified marshall dealer have them look at it.
Sounds like a problem with the channel itself, if the clean channel works then its not the lead, input, guitar or the drivers. You have to be careful when opening up amps as some can hold a residual charge and there can be danger of electrocution.
I would recommend getting it looked at by a pro, it doesn't sound like an expensive fix.
You may have damaged the variable resistors (the volume controls), you can purchase replacements from a local Electronics store (if UK based try Tandy). Otherwise have you checked the speaker itself for damage? You may have split the speaker which will need to be replaced.
The fuse is in a "boat" right next to where the power cord plugs. Pry outward on the tab of plastic where the power cord plugs in. The tabe is about 1/4 inch wide.
IF THE FUSE HAS BLOWN, better find out why as replacing it MAY cause further damage to internal components. If you do replace it and it blows again, take amp in for servicing.
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