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Green line down the middle of the screen

I have a very fine green line down the center of my monitor How can i get grid of this line

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  • Anonymous May 25, 2009

    very fine line down the left side of the screen that is green

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Often times this issue is caused by either a loose or damaged VGA cable. You can verify the issue often times by firmly wiggling the cable and watching to see if the line disappears. If that does not resolve the issue you will need to replace the monitor

Posted on Apr 23, 2009

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Posted on Jan 02, 2017

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47LD450 LCD tv has green line down middle of screen


Sorry, you can try reconnecting connectors on T-con board (small rectangle board at top center under metal shield)if you are lucky, but it is likely a panel failure. It won't hurt to watch it as it is, if it doesn't bother you

Feb 16, 2014 | LG 47LG50 47 in. LCD HDTV

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How i adjust horizontal size and vertical size


To answer your concern, all you have to do is to change the setting of your aspect ratio on your TV.

Here is my suggested way to procede:


1. Apply 1080i signal, which should produce an oversized HD image on ColorStream1or 2.
2. Select an HD channel that is broadcasting standard 4:3 image, not wide screen.
3. Switch to the Service Mode ( Please refer to the above links). In the Service mode, press channel up/down to find the Adjustment parameters needed for the following steps.

4. Adjust HIT with volume up/down control for the image height to 22.5 inches.

6. Adjust WID for image width of 30 inches, (22.5*4/3)
7. Adjust HPOS to center the image.
8. Adjust PARA and TRAP to minimize geometric distortion.
9. Switch into Convergence mode and Adjust VLIN to get equally spaced horizontal grid lines.
10. Measure the length of the central grid lines and note the number of horizontal and vertical grid lines. This information is used to create an overlay grid.
11. Create the overlay grid on 40x25 x0.003 inch clear Acetate sheet, which you can get at the Art Supply store for under $2. Draw the grid with a fine line erasable pen. Draw vertical and horizontal lines through the center of the sheet so that the lengths are the same as the central grid lines. Now draw the grid so that it has the same number of lines as the convergence grid but are equally spaced, with the outer ones at the ends of the central lines.
12. Cut off about 1/4 inch from the right side of the sheet so that the sheet can lay flat against the screen, which is slightly less than 40 inches.
13. Put a reference mark on the TV frame 2.5 inches down from the upper left side of the screen.
14. Place the overlay on the screen so that the upper edge lines up with the reference mark. The overlay sticks by electrostatic attraction.
15. Use convergence controls to remove grid distortion and converge grid colors. Refer to the Anamorphic link for details.
16. Enjoy 1080i.

Other Comments:
I didn't realize I could create the overlay grid before placing the Acetate sheet on the TV screen, until I finished drawing the grid with the sheet placed on the screen. I added grid lines as called for in the procedure. I'm sure this method took much longer no only to draw the lines but some of them were difficult to see.

Part way through the convergence procedure, I became concerned that the image width was off since I did my screen adjustment with wide screen image. Thus, I decided to repeat that step with a 4:3 screen.

I confirmed the need to press 7 often to save results since after I adjusted one grid color without it, I accidentally hit a key that switched me out of convergence mode and when I switched back, all settings were gone.

Another mistake I made was not realizing that the cursor color determines which grid gets moved.


May 13, 2011 | Toshiba 32AV500U 32 in. LCD HDTV

1 Answer

Problem with the Acer AL1916W 19" LCD Monitor. My monitor was working fine this afternoon, and now when I turn it on the green power light is on but the screen stays black. can this be fxed or do I...


either your power supply has gave out on the monitor, or, and this is more likely, a capacitor has burnt out. Capacitors are required for a lcd, plasma, or dlp screen to energize itself. a charge is built up in those capacitors, and a static pulse is sent into the screen grid energizing it. If your monitor is still under warranty, take it to your local Best Buy, as they are a certified Acer Technical service center. If it's not, you can still take it to Best Buy, but it may be cheaper to replace it.

Dec 14, 2010 | Acer AL1916W 19" LCD Monitor

1 Answer

VF723 Monitor has fine line in middle of screen w/clicking noise


check the monitor in bios screen if the same happnes need a repair.

Sep 15, 2009 | Computers & Internet

1 Answer

Sony 43 inch rear projection tv, I have lined up the convergence but still seeing red and green around edge of the tv on the images, seems fine in the middle of the screen though.


Always start at the vary center of the screen with Green. Position Red over Green, then Blue over what now will look yellow. If all is perfect except the outside, you will need to adjust "Mid-Size" until the middle is just as far off as the outside lines. Then adjust the main "Size" adustments to match. Go very slow or you can make a mess of it.

Mar 06, 2009 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Green picture


a green screen on power up with retrace lines. At shut down a point appears in the middle of the screen. Sounds like either a shorted G2 grid, or bad flyback. If a phospher flake has shorted the grid in the tube, you can sometimes have luck by using a megger set at 1000VDC, to burn away the short. This is usually caused by the line HV going too high causing the anti-UV protection to kick in so fit a dummy load 40W lamp instead to the line output to allow measurements to be made.

Oct 19, 2008 | RCA 20F512T 20" TV

1 Answer

LCD TV - Vertical Blue line


My Lcd monitor has blue line? How can I solve this problem?

Nov 14, 2007 | LG Flatron L1750S 17" LCD Monitor

2 Answers

Warped Picture, Separated colors


Each color (red,green & blue) has an amplifier IC (STK-).
When there is a convergence issue,the first step is change both
IC's for reliability. Then check for open fuses devices,usually
pico fuses.Then re-check convergence alignment.......T.

Feb 07, 2007 | Philips 60PP9352 60" Rear Projection...

1 Answer

Monitor blackening out and sudenly shuting down...


Hello! Sorry to hear of the Tennis Ball Masacre. I believe your problem to be twofold in nature. First the glass in side of the LCD screen is very fragile and the tennis ball most likely ruptured it. the streaks are most likle the liquid crystal solution leaking out. the dark streaks represent the absence of the fluid. Secondly, the monitor shut down appears to be from the back light / inverter circuitry. Sounds like it may be time for a new display. $40 to $60 for the inverter board and $80 or more for a new display screen, you may as well go the couple of extra dollars and get a new monitor. Hope this puts it in perspective for you. Sorry it is so bleak!

Aug 11, 2006 | Dell E173FP 17" LCD Monitor

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