PSD Image went black

I'm suddenly having trouble with one of my psd files, it's gone completely black and missing all of its layers. No I didn't make it black and flatten it when I saved it. In the thumbnail when you say file>open it looks completely fine but when I open it its just black, even the grey area behind the picture is black.
I'm really annoyed and frustrated cause I was almost finished with the picture...
Has anyone run into this problem before?

 

Ive never had it go all black, but ive had a psd file have thick black and grey lines in it. I have no idea why it happend, but I just had to redo it, cause I couldn't figure out how to get it to go away :/

 

I've never had it go all black either, that's really weird. I'd suggest copying all the layers into a new document of the same dimensions if nothing else works.

 

this might be because you might hit a desaturation by mistake.

 

you might have pressed something on your keyboard

 

but now only one layer . i cannot able to see other layer.

 

Save the file in another format and see what happens.

 

not working

 

dude, upload the file somewhere (or crop of it) theres a thousand ways to do in black