When I turn on my camera, it shows a black screen, so I'll take a picture anyways and its black.. no picture ..is it fixable or should I throw it away? Next to where the flash goes off..there is a light that should go on but doesn't so that might be the problem ...I can still see pictures that I have taken in the past.

Hello, On the C743 this will require that the LCD unit be replaced. This will get very costly real quick unless you can do it yourself. Not much more I can tell you.
Best Regards, Russell

Yes, your screen is dead. You really don't have any options other than to return it to the manufacturer for repair. :(

It would depend on exactly where the splotch is. If it's on the outside of the viewfinder, you could simply clean it off with a damp cloth (and maybe some Windex or Formula 409). If the eyepiece is damaged, you can order a replacement part here.

Remove the lens and look at the mirror. If their is something on the mirror, you can carefully clean it. The mirror is very sensitive and vulnerable to scratching. If the reflective coating has been removed then you'll need a new mirror.

Look up at the bottom of the focusing screen. That's the more-or-less clear piece of glass that the mirror will reflect light from the lens onto. If there's a splotch on the outside, you can clean it off.

Those are the parts you can get to. If the splotch is on something on the inside, then you'll have to take the camera to a good camera shop to have a trained professional disassemble and clean it.

This is a digital voice recorder, not a camera. Try posting this query in the office equipment forum.

Sound like a malfunctioning CCD-image sensor. Rare, but possible problem with your LCD screenviewer... in both cases (LCD or CCD) this isn't a job that you could solve yourself; this wrong include distorted images or abnormal colors, scratchy purple lines, blank or black pictures, and/or black videos with good sound being recorded on the camera's flash card.

I suggest check THIS LINK for additional details in this previous solutions for an Defective CCD (Charge Coupled Device) and next contact your Samsung service. I strongly suggest (taking into consideration the age of your camera) to evaluate the cost of repair versus the cost of a new camera with similar features, before making a final desicion.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Yes it is. Press the DISP button on the back of your camera. This manually turns the screen on and off to save batteries.

Throw it away and buy the next one- keep this one away from water.

i have the same problem i need help fixing it?

Not fixable - check Olympus for a repair estimate - be prepared to junk it and start over

Mine too! Thank you so much for posting this issue!!