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.
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?
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