Question about Sony CPD G420 19" CRT Monitor

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Picture is far too large, exceeds screen, colour cannot be adjusted to anything but very bright. Screen now flashes while on line.

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On your crt's manual menu you can resize the screen hit the menu button on your screen to begin or you can try the auto button

Posted on May 09, 2009

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2 Answers

How do I alter the colour, brightness, and contrast?


Go to menu, go to screen settings or display settings. Should bring up the sharpness, contrast, color, brightness controls. Follow directions on screen to adjust. Hope this helps!

Jan 29, 2016 | Televison & Video

1 Answer

Screen is really bright on dynex dx-l42-10a. Still show picture but bright no matter how it is adjusted. Was fine while watch TV & picture just got bright like the darkness quite. Any suggestions & what...


Sounds like screen voltage has exceeded much. Its LOT adjustments should be checked. Contact any service technician.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Aug 25, 2014 | Televison & Video

1 Answer

Lines on the screen


Hello
If the lines are thin and spreaded allover the screen from top to bottom, and are equally spaced around one inch of so apart, it will be a screen voltage rise problem. You just decrese both brightness, contrast and colour contols of your TV to zero position, and look into, where there is lines are visible on the screen or not. You should notice this in a drak room, so as to see is well, or close all the doors and windows to make the circumstance to a little bit dark.
If you can see these lines still, it is clear evidence of the above said fault. To rectify this fault you should open your TV. Open the back cover of the TV, and you will see a Line Output Transformer. It is otherwse known as LOT. It can be recoganiized easely as it its size. Normally it will look black in colour and a thick wire from it goes the picture tube's final anode, and look like it is stcked to it with the help of a rubber ******. Other two wires from it goes to the picture tube base board. These two wires are, one for focus and the other for screen.
There will be two controls on the lot, which can be varied, and seem to be integrated with LOT. Among, upper one is for focus adjustment, and lower one is for screen adjustment. Both will be marked as "Screen" and "Focus". You just find out the screen control. With the healp of a screw driver it can be adjusted.
Keep the TV on, Brightness, Contrast and colour to minimum, adjust this control to a little [ a very little movement should be done, otherwise the picture will be get blurred], to just eliminate the lines you see on the screen. Focus control and screen controls are interactable, that is adjusting one may effect the other. After eliminating these lines just up the brightness and contrast control to at about their mid position and press the menu button on the TV or remote control to get the menu screen. Look at the letterings, and if it seem to be out of focus only, just adjust the focus contorl to get well focused captions. The adjustments are hot, that is while the TV is operating. Take care. Ok.

Oct 26, 2010 | Mitsubishi CS-40503 TV

1 Answer

Some channels on my tv are dark and tinted orange, I used the menu button to display the menue and scrolled down to picture but I did not know how to select picture.


Hello
Adjust colour control to zero, and check for a pure black/white picture. Adjust contrast and brightness control to minimum and check whether the picture goes completly off or a slight picture prevails. If the picture goes out when you turn down brightness control to 1/3 position, that is about 20 points, your TVs screen voltage is very low, and it can be adjustable. If the picture does not go out and more brightness prevails, screen voltage is high. If the screen voltage is high, there will be some fine lines across the screen at about an inch apart; on the whole screen from top to bottom.
Screen voltage adjustment is critical for the clarity of the picture. If it is low, no proper colour will be dispayed. If it is high, it is harmful to both picture tube and your eyes.
Never try to adjust it without proper knowledge about it. The screen control can be located alongwith the LOT [Line Output Transformer], of your tv. There will have two adjustable controls there, one is for Focus, and the other is for Screen. Both are interactive, that is adjusting one will effect an other.

Oct 18, 2010 | Emerson TS2587D 25" TV

1 Answer

Leapster 2 screen to dull to see


The leapster 2 screen is so dull you can hardly see the writing and programs. Very dark in colour. You can see colour arounf the edge of screen but the darkness overpowers the screen.

Jun 06, 2010 | LeapFrog Leapster 2 Learning System

1 Answer

Sony Color Rear Video Projector - KP 57hw40 / Mfg. February 2002


i have the same problem picture is blue/green with blue and green arched horizontal lines

no picture at all only sound then tv shuts off after 5-10 seconds and then a bright blue flash in the center of the screen

have tried adjusting the voltage screws didnt do anything

Jul 13, 2008 | Sony KP-57HW40 57" Rear Projection...

2 Answers

28PW9527 Retrace lines (?)


These adjustment controls are on the HT transformer. (Large plastic block on one corner of the main board - looks similat to a distributor cap on a car.) They are usually a plastic pot with a cross in the end to fit a flat blade screw driver. (This is the large blocks Philips TVs usually have three adjustments on the transformer:

  • Voltage
  • Screen high voltage
  • Focus
If you can locate these controls on the transformer, make a slight adjustment to each in turn, noting where the control position is before adjustment, so you can put it back.
When you have found the right control it will go brighter or darker.

Before adjustment, set the TV brightness control to about mid way. Ideally the screen should have a completely black image to show up the scanlines.

Adjust the control until the scanlines disappear. Do not over-adjust or the screen will appear too dark.

TAKE GREAT CARE not to touch anything other than the control. HIGH VOLTAGES

Mar 28, 2008 | Philips 28PW9536 28" TV

1 Answer

Picture is dark


sitnlisten - yes it does appear your pix tube is getting weak,but we may be able to turn up the flyback alittle to brighten up the picture.If you take the back off you will see the flyback-large black unit with a wire going to the round rubber cap on the back of the pix tube.Look at the flyback there are usually 2 adjusters one marked focus the other screen,just turn up the screen a little bit at a time.If you turn this up too much you will wind up with retrace lines on the screen.You may also want to check the pcboard ass'y for a sub bright adjust,and same thing small adjustments.If this don't help your pix tube may be too far gone.I hope this helps. cooltek Feb.1/08

Feb 14, 2008 | Zenith C27A24T 27" TV

2 Answers

The picture on my JVC TV is too dark


On the inside of the TV, on the flyback transformer there should be two controls. Turn the one that says "screen" very slowly clockwise while looking at the pix. The pix should get brighter as you turn it up- if you go to far you will see lines in the pix or the TV may shutdown.

Aug 30, 2007 | Televison & Video

2 Answers

Dark picture (HELP)


Open up the back of the set but be very carefull. Notice a large black block with a large red wire that runs up to the picture tube. on one side of that large block where the thick red wire is comming out of are two controls, one should be marked focus or F and one should be marked screen or S. With the set operating normally and not touching anything else, slowly turn the control marked screen or S clockwish till the picture gets bright enough. If you go too bright the set will shut down or you see small thin white lines so back down on the control. then touch up the focus and your good to go. good Luck.

Dec 01, 2006 | Toshiba 32A42 32" TV

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