Nikon D300 AF Assist Problems. HELP!!

[kingbling11]

Hi all.
Having a problem with my D300 whereby the AF illuminator is stubbornly refusing to work. I first noticed it today when i was shooting a low light party and my camera wouldn't focus. I thought it may be the SB-800 Illuminator switched off so i looked at the menu, and it was on. I tried taking the flash off and the Built in one didn't work. Checked in the menu and guess what, it was on. Here's the weird part though. Tried my SB-800 on my dad's D3. It worked fine. Dad's SB-900 on my D300, worked fine. But My flash on my camera and its a no. Even no flash is just not working.

Please tell me what I'm doing wrong (Hopefully the body's not broke as it ran out of warranty a couple of weeks ago) as in low light my camera AF is currently simply making the camera heavier.

Thanks in advance.

 

[SimonTALM]

Which Autofocus mode are you in? AF-Assist only works in Single Shot AF mode

 

[kingbling11]

Have been in single yes. I did all the tests with different flashes ETC without changing any settings.

 

[knighthawk]

Have been in single yes. I did all the tests with different flashes ETC without changing any settings.

have you tried the 2 button reset...it should resolve the problem for you

 

[kingbling11]

Just figured part of it out. The Assist only works when the focus point is in the centre. Still dosen't explain why the SB-900 assist works though. :shrug: