I noticed recently that I have a cluster of about 9 pixels showing red. I contacted Nikon technical support who looked at some photos and confirmed they are 'hot' pixels and say I have to send the camera in for repair. My D300 is almost 5 years old so well out of warranty, and Nikon say they cannot give me even a ballpark figure that the repair will cost, although they will advise me of the cost before they do the repair.
Adobe Camera Raw automatically gets rid of the red dot the hot pixels cause, so I do not know if to send it in for repair or just live with it. Has anyone else got this problem? Any advice anyone can give me would be much appreciated.
Fixing hot pixels is a low level repair, they just use software to map out the bad pixels and then the cameras processor ignores those pixels. So, the cost is likely to be low.
This has the same basic effect as using Camera RAW to get rid of the spots.
The only real concern I would have about not having it fixed - is that hot pixels could make the camera harder to sell. On the other hand - the second hand price for a D300 is already pretty low so it may not be worth worrying about.
After 5 years the sensor is probably due for a good cleaning.
Below is a good website about sensor cleaning. Their products are good quality but you may want to look for a European supplier. Some camera shops will do sensor cleaning if you don’t want to do it yourself.
Gary, After owning my D300 for a few months, I had what I thought were hot pixels last summer. Turns out my sensor filter was dirty. I can second Dave's advice--Copper Hill has a great kit at a reasonable price, and if you follow their instructions, your problem will probably be resolved. I was nervous about cleaning the sensor the first time, and it took me five or six tries to get it right, but after that, it seemed to be much easier. I am finding I need to wet clean about every 6 mos. now.