I have a Zenith C27A24T the picture is out of focus.

Greetings - You need to have you DVD player hooked up to the video inputs - See below. Don't mind the mouse scratch out lines. The Device on the right represents your DVD player.




You then have to choose video as your source on the TV (not channel 3 or 4) using your remote - see below.


You should be good to go.

Enjoy your movies,

Mikeywaf

hit your TV lightly on left side or right side or on top & then observe ..........you will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some TVs on main board (also on circuit board that is fixed to CRT TUBE ) at some soldering joints crack develops....then due to loose contact picture becomes small in size or disappears or rolls ( in your case )...........when we hit that lightly then those loose contacts joins temporarly & again picture appears for some time............so solution is ......TV main board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting TV lightly if there is no response then main board has to be checked completely........in your case iam sure it is loose connection problem.........joints should be re - soldered ...100% it works again................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other tools....................so contact good TV service engineer

There is a focus control on all CRT sets. It would be on the back of the set. It might be accessible or it might be inside which would involve removing the cover off the set. This is not recommended as there is very high voltage present in there. If it is accessible from the back without removing the cover there will likely be two little plastic knobs. One marked "F" for focus and the other one marked "S" for screen.........don't rotate the screen control, adjust the focus until your picture becomes clearer. If this doesn't help a whole lot then your picture tube might be shot and that means time for a new TV.

There are 5 RCA connectors on the back of this TV, (according to the manual). The lower three from left to right are Video in, Audio Left in, Audio Right in. There are also two RCA connectors above these that are the L/R audio outputs. Also, there is an S-Video input which I would recommend using instead of the RCA Video in. You'll still need to use the RCA inputs, but the S-Video will give you the best video connection into this monitor.

Call Mats for screen/focus control box 1-800-628-1118 for Zenith Boards Call Zenith Exchange 1-800-632-6637

There are connections on the back of your TV for Audio and Video inputs. You connect the corresponding connections to your DVD player. You then use the TV/VCR SOURCE button on your remote to change to that input. In case you don't have your manual the following web address will take you to a place that will let you download the manual.

http://www.retrevo.com/support/Zenith-C27A24T-TVs-manual/id/277ag102/t/2/

Dark picture? hmm.
meaning there is no brightness variation, assuming this is the fault I think U might be having low screen voltage. Check for high value ( around 2W) resistor, preferably from 100K to 680K on the "C" board or neck board. Post back
Rifaa

If you take off the back of the TV there are additional tuning buttons. One is for the focus. I have a model SY2551S and have the green tint problem. Have you resolved that?

press -------- |tvvcr | |source| -------- its by the timer button on the bottom of the remote

picture tube need a picture tube reguvinator $1300