I fear my D90 is dying. I get a blinking green light near the battery when the card is in and camera on. I've troubleshooted the obvious; cards and batteries. I've heard that it's generally the circuit board that is dying and eventually the camera will just quit. My question is if it is worth getting fixed?

I have wanted to upgrade but hoped I had time to see if a 400 would appear. I know the 7100 will be available soon and I've thought about jumping to the FX world with the 600 but all my lenses are for a DX! I'm in a pickle because I don't know if time is on my side. Advice?

Thanks!

From what you posted, it is safe to assume that you have tried several different cards? If so, the next thing to try is a complete reset. You can remove the battery overnight and/or do a reset as described in the manual. If that doesn't fix it I suspect the camera is done and it is likely beyond economical repair.
You could always pick up a used D300(s) for a while. Prices are low enough and you would be able to recoup most of that should a D400 come out soon.

Thanks, yes I already tried your suggestion several different cards, several different batteries and reset -- cooling the camera, and after two days = nada!
I'll take it to the camera shop (about the only one around here) and just ask and see what they say! C'mon Nikon!

Likely a bent pin that goes into the flash card in the flash card receiver.

Even if a D400 comes out I'd think your D90 would still be useful as a backup camera.

Just an update with my blinking green light issue. They said it was in the on/off switch and is a fixable issue at a very reasonably cost. YaY... that buys me some time before my next camera purchase!