Guitar amplifiers need to be taken good care of so that they will remain to function in the most optimal manner for their owner. However, in case you find your guitar amplifier in need of repairs and you need a quick fix, you can try the following procedures:
Inspect: If your amplifier seems to be generating strange humming sounds, you may want to examine the nuts and bolts in the guitar since the vibrations may be because of these nuts and bolts being loose. Make sure that every nut and bolt is in place and are tight and if one is not that tight, tighten it using a wench or screwdriver. However, be careful with speakers since the nut and bolts in it need a bit of room for the vibrations to go through so refrain from over-tightening it.
Tubes Amplifiers: It can be difficult to determine if a tube is durable enough to last a year or not. For most guitarists, tube amplifiers are the best option. The best was to repair a broken tube or at least keep it from breaking is to read the instruction manual of the product thoroughly and then learn everything that you can learn from it.
Fuses: Always make it a point to have extra fuses in your repair bag or tool bags in case a fuse blows up. Also, take this kind of situations seriously because a fuse that blows up indicates a more complex problem which needs to be dealt with right away. It is also important that you have an idea of the kind of fuse that blew up since you cannot simply replace it with just a random fuse.
In case there is no more hope in repairing the broken amp then you can always get yourself some budda amps at guitar center.