Question about BenQ FP731 17" LCD Monitor

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Ive got different color lines running up and down my screen that are 1/2 inch wide every 4 inces across flashing and when i open boxes it erases the text w/ colored lines i have a emachine lcd 500pw model

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Please go to the repair center and chk for picture tube

Posted on Sep 10, 2009

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Posted on Jan 02, 2017

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How do I correct pink and green bands accross HP-R4252 Plasma TV


First of all try, changing the input device to some other and see whether you see the same problem. Then connect your present input to a different TV and see. If you feel the input is ok, and it is a problem in the display, this is a case to be handled by a qualified service technician.

Jul 16, 2012 | Samsung HP-R4252 42 in. Plasma HDTV

1 Answer

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

Black line about 5mm wide running across the screen about an inch from bottom 26"vistron hdtv "help please"


Just try the reset first by unplugging the cord from the wall for 4 hours in order to drained the current stored inside in the IC memory so it will erase and return to its original setting.

Good luck:

Regards:
VOTIT

Don;t forget to rate:

Jul 07, 2009 | ViewSonic N3251w 32 in. LCD HDTV

1 Answer

TV picture won't open.


The vertical sync circuit has gone bad...you'll have to have it repaired if you want to keep it

Jan 03, 2009 | Televison & Video

1 Answer

S500i screen problem


what you have to do is open the case and take out the screen and replace the screen

Oct 09, 2008 | Sony Ericsson S500i Phone

1 Answer

Mitsubishi VS-60705 Large Screen Projection


thanks for your detailed description of what happened.
replacing the vertical output i.c will correct the problem.
the reason it failed was bad connections on it.

Apr 22, 2008 | Mitsubishi VS-45605 50" Rear Projection...

1 Answer

No picture white screen


check you bulb and your color wheel notorious on this set

Nov 20, 2007 | Samsung HLP4663W 46" Rear Projection HDTV

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