T5s aren't Firing

[pco1988]

I went down the stairs today to find my T5s aren't on. I have had them running for about a month and a half now with no problem. But now they won't turn on. I thought it was my timer but when I took that out of the loop they still didn't fire.

I know it's not the power cord connection because I soldered the connection and there is no stress being put on the joints.

Any ideas?

They are 2x 24" T5s on a 660.

[IceCap Service]

Do they flash then shut down or just do nothing at all. If they try to light then shut down go to http://www.icecapinc.com/troubleshooting.htm and do the continuity test as it could be an open circuit.
If it does nothing check the fuse. If it is blown replace the fuse. If it blows again, the ballast will need to come in for a quick repair.