First things first; Arcing between fuses in a panel is very dangerous. That means there was a short to ground on one of the voltage lines. So get a good light and a magnifier glass and thoroughly inspect the board for any loose debris that might be there.
Then, find out what these particular HOT fuses are for and make sure each one has the right sized fuse in the holder.
Third, Measure the DC-Voltage on each fuse and it MUST be only around 13.5 to 14.5 Volts to ground.
Remember, those fuses are designed to blow when the current load on each line is too high and if you have HOT fuses your systems are not designed for this to be the case.
Once you know you have the right value fuses in each holder then you'll know you're safe and you can see about your DC-Voltage level situation.