Nikon D3100, dark band when using the flash

[trelowarren]

Hi I know this is an old post but I have exactly the same problem as you apple_head, Nikon have just told me they want £165 to fix it, that's half what I paid for the camera! Did you ever find a solution or is a case of 'stump up'? The faulty part is an MG PCB UNIT (allegedly) but I'm wondering if this is something I could source and fit myself. I have been given no explanation why this has failed on a two year old camera or what the cause could be-any one able to enlighten me?
Thanks