I just replaced the LEDs in one of my broken sets, and now they work great. It took me about 15 minutes to change them out. I replaced the red and blue LEDs with some bright white LEDs I had laying around the house. The red LED that comes in these is just weak. I checked the value on the resistors and they are fine. The red LEDs are just bad... I didn't have to replace the blue LED, but I wanted both sides to match so I did. If you don't have access to LEDs then it will cost you between $3 and $5 to fix them with RatShack parts. Plus you need to know how to solder or make this your time to learn.