McCranium

Yes those LED are not as forgiving as the regular 3mm LED that power and HDD LED normally. It is possible that by reversing the leads the current damaged the small board they are on. As mentioned There is a replacement on the Corsair site for about 5 bucks. For me it was not an issue as I've unplugged the underflow LED and used my own white LED solderred to a previous HDDLED wire. The Power LED still works fine. There is no HDD LED lead for this case despite what older manuals may say..

There is no HDD LED. What I opted to do was: 1) Disconnect the underglow LEDs. 2) Cut an HDD LED wire from an old case and attach/solder a white LED to the wires. 3) Connect the new white LED to the HDD LED on the mobo. 4) Run the new white LED connected to the HDD LED to the same spot where the underglow is located at the bottom front of the case. 5) Presto! I have a white HDD LED! NOTE: If you don't have an old case, HDD LED can be purchased online.

The 275R under glow LEDs can be detached. They are fine when the system is powered up but are a little distracting when the system goes to sleep and are blinking. They are powered by the same P LED - and P LED + leads (power button LED) from the FPANEL.