Xantrex Freedom 450 inverter

I have a 2006 Fleetwood 39L Excursion. I was having inverter Problems not charging batteries. Took it to local rv service center and they stated that the inverter was bad. $1000 for new one plus install fee. Checked prices and yes that was the going rate. Told them to hold off and took rv home. I was telling a friend of mine about the situation and he said to let a buddy of his look at it first who is a Fleetwood service Guy and was very good with electronics. When he arrived he removed the inverter cover and replace a .59 cent fuse and the inverter fired up and started doing its job. He stated that he must have 500 of the fuses in his truck because that is usually the issue. He worked for a dealer once and was told to replace inverters not fuses... Just a fyi...Always good to ask someone else before spending that hard earned money