Adjusting vertical height

Check the aspect ratio set. If it is set to wide, there will be black bars at top and bottom of the screen. Go to its picture setting menu, and adjust the settings. If it do not help you, enter its service mode to adjust the picture height. Although this is a semi-skilled work, if you have patience and concentration, you can do this adjustment. There is no need to open the TV. If you wish to get more details about how to enter service mode, and adjust the data values there, check the site linked here. http://electronicshelponline.blogspot.com/

You may need to adjust the resolution of your laptop to fill the full screen of the TV.

Are you using a cable box like a DVR?...there should be a setting on that for aspect ratio, not sure this is a TV issue

If the image on screen is zoomed both in vertical and horizontal direction, your TVs power regulator inside it is faulty. [Overvoltage]. If it is zoomed in vertical direction only, that is only the height of the picture is zoomed, you can adjust it with the remote control button directly on going through menu and get in to the function menu. Normally all TV remote has a special button marked as "Zoom" which on pressing it once the picture get zoomed, again another press the picture gets wide and again an another press picture will come to normal mode. You should select normal mode to retify the problem.

Hi!

Found some relevant info on how to adjust your video settings... You might want to give it a try!

Thanks! =)

4.12 PC Input Picture Adjustment
The Picture Adjust menu operates in the same
way for the PC Input as for the DTV / TV input in
section 4.2 for Backlight, Contrast, Brightness and
Color Temperature.
4.12.1 Auto Adjust
When the MENU button is pressed, the On Screen
Display (OSD) appears on the PICTURE ADJUST
page. Press the button to highlight the Auto
Adjust selection.
Press the button for the LCD HDTV to adjust to
the PC signal timing automatically.
4.12.2 H-SIZE
Press the button to highlight the H-Size selection.
Press the button to start adjusting the horizontal size of the picture. Use the or button to adjust
the horizontal size.
4.12.3 Horizontal Shift
Press the button to highlight the Horizontal Shift selection.
Press the button to start adjusting the horizontal position of the picture. Use the or button to
adjust the horizontal position.
4.12.4 Vertical Shift
Press the button to highlight the Vertical Shift selection.
Press the button to start adjusting the vertical position of the picture. Use the or button to adjust
the vertical position.
4.12.5 Fine Tune
Press the button to highlight the Fine Tune selection.
Press the button to start tuning the to the PC signal. Use the or button to adjust the tuning

4.14.1 Understanding Viewing Features
Your LCD HDTV features four viewing modes and Picture-In-Picture (PIP)/Picture-by-Picture (POP) mode.
You can switch viewing modes using the remote control.
4.14.2 Viewing Modes
Normal Mode
The original 4:3 aspect ratio (1.33:1 source) is preserved, so black bars are
added to the left and right of the display image. Standard TV broadcasts are
displayed with a 4:3 Aspect Ratio. Movies in 4:3 Aspect Ratio may be referred
to as pan-and-scan or full frame. These movies were originally filmed in 16:9
(widescreen), and then modified to fit a traditional TV screen (4:3).
Wide Mode
When watching a standard broadcast or full-frame movie in this mode,
the display image is stretched proportionately to fill the TV screen.
When watching a widescreen (1.78:1 source) program or movie, the
display image fills the TV screen. If you are watching a widescreen
(1.85:1 or 2.35:1 source) program or movie, there will still be black
bars at the top and bottom.
Zoom Mode
When watching a widescreen (1.78:1, 1.85:1, or 2.35:1 source)
program or movie, the display image is zoomed proportionally to fill the
width of the screen. The top and bottom are cut off to remove most of
the source material’s black bars. This mode is good for programs or
movies with sub-titles.
Panoramic Mode
When watching a standard broadcast or full frame movie in this mode,
the 4:3 Aspect Ratio (1.33:1 source) display image is stretched
horizontally on the left and right sides to fill the TV screen. The center
of the image is not stretched.

Note: Viewing modes are saved based on input. For example, you lasted watched a DVD in widescreen
mode and then watched TV in standard mode. When you switch back to DVD input, the viewing mode
will return to widescreen.

TV model # PCJ 612 R SAMSONG SERIAL # 39Z 300 125 W

You don't give a model number or age of the set so I can't be too specific, but there is an adjustment for picture size (it's actually termed "vertical height") in TV sets. Many newer sets make adjustments through a service menu using the remote control, but many sets have a physical adjustment control inside. I can't tell you how it is in your set, but you can take the back off and look at the circuit board. If you see a small round adjustment control (screwdriver slot for turning) marked "vertical size," "height," "vh" or something similar, that's the one. A little turn one way or the other will do the trick.

Now having said all that, it's also possible there may be bad capacitors in the set's vertical circuit. Is this a problem that just started, or that's gotten worse over time? Do you notice distortion at the top of the picture, like a person's head or other round object looking stretched out if it's at the top of the screen? If so, that's usually a sign of capacitor failure. There are a few in the vertical circuit, usually in the range of 1 to 10 mfd at 50 volts, and they commonly go bad with age. Without knowing what model TV you have I can't suggest specific part numbers.

Hope this helps or gives you a start.

There should be controls for height and linearity. They may be labeled as Vertical, Hold or Size.

Hope this helps. :)

check the cap that couple the horizontal transistor, this could be bad replace the flyback.all caps and transistors in that circuit should be cheked.good luck.

I think what your asking is for an on screen service menu?? That wont fix your problem. It sounds like you have a vertical height problem where the screen doesnt fill the entire screen with the Picture. The adjustments wont go out like that for no reason and all by them selfs. The vertical sweep IC went bad and is going to have to be replaced. This is not a job for the end user. You should call an experienced tech to assist you with this repair. Good Luck