Everything black and white through viewfinder

I havent seen your pictures but your veiw finder shows more than your camers sees so next time dont zoom so close to the subject
make your own pretend boarder to compensate.

The s7000 has three different display modes: Screen, viewfinder, and off. Screen is for looking at the big screen, viewfinder is for looking through the digital viewfinder, and off should turn off all the displays. Try pressing the DISP button once. That should reactivate the screen and make it possible to use the camera again.

There is lock on black portion of view finder push it and turn it anti clockwise it will open and use hand blower n clean it

iam very sorry that you have this problem.When an LCD screen of DSRPD170P stops working it means that you have to get a replacement LCD screen. The replacement requires a qualified technical person. if you have such a person , then here are the details for ordering the LCD screen parts:
A-7078-956-A PD-217 board complete.
8-753-209-13 ACX500ENA
1-517-931-21 Tube fluorescent cold cathode.

Please note that the viewfinder of the DSR PD170 camera is always manufactured and supplied as black and white (not colour) so this is not a fault!

I have the same problem except everything is white, not black.

You should go into the menu, camera settings and set the evf to on. EVF stands for electronic view finder. This can be set to be on when the lcd is open or closed. CAreful, if the evf is set to on and you point the viewfinder towards the sun, it will burn white marks into the viewfinder and ruin it.

It's where you find a view of what the light coming through the lens. Today's consumer camcorders place the viewfinder center-rear usually with a rubbery piece around the end as an eyepiece/cup. Many units shut off the image to the eyepiece if the flip-out LCD screen on the side is used.

Use the diopter adjustment to refocus the viewfinder to your eye.

Point the camera at a sign or something with writing on and half press the shutter button to focus then move the little adjuster at the top right of the viewfinder until the image in the veiwfinder is in focus

Is the battery dead? Try taking it out and charging it, then put it back into the camera.

Also, you can try using another battery of the same type.