Answer to "Why my CPU fans got loud noise like spin very fast?"Hello! I have had this type of Dell power supply http://hardware.nl/power-supply/dell/gr391.html and it started to make loud noise. I thought that it is brolen but tried to fix it. I remove the connectors and put it bach again. It helped, so you can try it too.
Answer to "Why does my printer suddenly says the toner is not compatible?"I have the same model of printer but I have never had such problems.... Have you ever replaced the toner? Are you sure that you bought the right model or was it qualitative enough? It is very important! I have seen here hardware.be/printkop/brother a lot of toners for almost all printer models but I have never tried it. Although the reviews of this shop are positive. Have you ever tried it?
Answer to "Is my printer's fuser failing?"Hi, Ryan! You know I had the same problem with my printer. First 2 years it worked very fast an good, the printed text was bright and legible. But than I started to notice that the text are smoothed on the page and my fingers are always in tone, I called to the service center, they took my printer and said that fuser unit is broken. So more likely you have broken fuser unit. I have bought new fuser here http://hardware.nl/fuser-unit/ they have for HP as well. Search it