Along with cleaning the dust and dirt off the grills of your fans, you should also clean the motor out. This will help make the fan last longer, perform as it did when it was new and possibly save energy. Its very easy to do and only takes a few minutes.
Split-screen Comparison of the original RF output and modified Composite output of an Atari 2600.
Oddly enough, they look much more similar on youtube than the raw files.
How to fix a stuck cd tray/drawer on a cd changer, replace belts and disassemble.
Sony CDP-CE405
Remember to ALWAYS keep your equipment UNPLUGGED while repairing and proceed with caution.