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Marshall amplifier I have an old marshall guitar amp that keeps blowing a fuse. How do I figure out what is cuasing this and fix it?

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Re: marshall amplifier

Old marshall eh ?? how old ? is it solid state or tube.

Posted on Jan 08, 2008

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Power inverters can do this if they are internally shorted or they are being over loaded. If you are just using it to charge a phone or a computer it should not be over loaded. Now if you are charging a computer and running a small cooler at the same time, that may be real close to max which may blow a fuse. Have you tried hooking it straight to the battery to see if it will run what ever you are running. It has it's own fuse so if it has an internal short it will blow that fuse. It if works hooked to the battery and is just blowing the cig lighter or acc. fuse it can be a weak socket. If the socket is hot it may have a loose wire on the back side causing low voltage which can blow a fuse. So hook it to the battery direct, if it works ok there, reconnect it to your acc port and if it is getting hot it may be the weak socket. If it will not run hooked to the battery, it has an internal short and it would be better to buy new than try and fix. Sorry.

Mar 22, 2011 | Vector VEC 024 400-Watt Power Inverter...

1 Answer

Motherboard light turns on but power is not comming on when power button is pushed. Not even the fan is powering up. What is the issue?

Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA and

the leads from your motherboard to your hard drive make sure they have a secure connection and are not faulty or just replace them there probably old and faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty or just replace them they are probably old and faulty ?
heres a tip
then click start run type cmd then type chkdsk/r/f which will scan for and attempt to fix any bad sectors automatically fix any corrupt files on your hard drive then defragment your hard drive you have to keep a computer very clean & free of dust and give it regular maintanance

hope this helps

Nov 27, 2010 | Gateway System Power Supplies

1 Answer

My laptop charger stopped working but when i put in a new fuse it works for a while and then stops working until i put in a new fuse ?

Something is shorting out or it is drawing too much current if the fuse keeps blowing on it.

You may want to look at replacing the charger

Jun 30, 2010 | System Power Supplies

1 Answer

I buy a used psu HP253232-100 Like to used it


I have spoken with HP techs and they assure me that this is not a standard HP product. However, it might have been manufactured for HP for a specialty item. At any rate, they fear that if you use this as a 48 volt linear amp the 57 amps rating will not be enough to keep the power supply from peaking, and in this case it would burn out. They would like to know any more info, such as the serial number, approximate size, and number of leads out if any.

As an alternative, you might consider posting this as a premium chat item, in which case you would pay for your answer, but would be guaranteed success. There are many experts in this field who may know the information you require, and the premium would attract attention much more quickly.


Figure 1: A sample HP Service Tag service_tag.jpg Figure 1: A sample HP Service Tag service_tag.jpg

Nov 12, 2009 | HP (253232-001) (253232001) Power Supply

5 Answers

450W ATX SMPS of Intex

sir all smps can be reapired using indian jugar technique. first of all see twi diods under the burnt transistors check them they are short then check the capacitors if they are not leaky or pregnant then see bridge reactifier change all that looks short or open then replace all and the transistors with 13007 transistors(jugad) be careful that 13007 must be isolated from heat sink that means metal part must be fixed to them but not short to them . replace the fuse with 2 ampere fuse (for safety) ..... have fun

Jan 21, 2009 | ASUS PSU | A-45GA 450W RT (A45GA) Power...

1 Answer

When I plug in my bass into my bass amp I can't hear it

Your best bet would be to take it to a guitar shop, or guitar center. Its a real ***** to mess with stuff like that when you dont know what the hell your doing. Could also be your instrument cable, try using a different one just to make sure thats not the problem.

Jan 07, 2009 | 3Com SuperStack II advanced RPS...

2 Answers

Soldered in new fuse, blew it right away...whats a good upgrade?

A new power supply will fix your problem, and when the fuse blows do not replace it. It blows to protect your computer. please replace with a new power supply.

Oct 28, 2007 | Okia / 450-Watt / ATX / 80mm Fan /...

6 Answers

Bass amp for guitar?

i say it can! u would get a nice clean sound! acoustic guitar sounds nice through a bass amp!

you probably wouldnt get distortion out of bass amp though! depends on the bass amp! some bass amps have built in effects! e.g distortion

Oct 15, 2007 | 3Com SuperStack II advanced RPS...

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