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NO! The use of a higher rated fuse than is recommended can cause the wiring to overheat and cause a fire. Use exactly what is required.
I have never seen a 4 amp fuse, only 3 and 5. The peak power draw and dump is when you switch on and off your TV. Try a 3 amp and if it blows when you turn it on, then no, your particular TV can't use a 3 amp fuse. Don't worry about this test, it shouldn't damage the TV and fuses cost so little.
In the UK, you cannot put a 5 amp fuse in a 3 amp plug. The general rule of thumb is that you should use like for like.
absolutely not
If the computer is moden then use 5 amp and if the computer is older and smaller then use a 3 amp
The difference between fuses is the current that they are designed to support. A fuse is intended as a safety measure to protect against overload. A 3 amp fuse should burn out if more than 3 amps is run through it, with some allowance for standard variance. A 13 amp fuse would burn out with greater than 13 amps. It is always a bad idea to use a fuse bigger than you need, because if your component is designed for a 3 amp fuse and you use a 13 amp fuse, there is a good chance you could damage your component with too much amperage because the fuse would not burn out at 3 amps, as was intended.
Usually nothing larger than 3 amp fuse. Under normal use 2amp fuse will work perfectly....
Yes. You put a bigger fuse and you will melt the wire and cause a fire hazard.
Fuse # 3 - 25 amp - interior fuse panel
If you do that the likelihood is that you will blow the 3A fuse quickly. There is a reason why the current fuse is what it is, because it is expecting currents around 80% of 13 A or around 10 A.
A 3 amp fuse sounds pretty small for that application. I would suggest at least a 5 amp, and probably a 10 amp.
In the USA (110 voly supply) you should fit a 5 amp fuse. In Britain or Europe (230 volt supply) you should fit a 3 amp fuse.