Question about iiyama Vision Master Pro 510 22" CRT Monitor

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Horizontal scanning does not work

Horizontal scanning failed. All picture concetrated in the thin (about 8mm) column in the center of the screen. I already took out the back cover, looked inside. From the first sight there are now bloated capacitors, burned transistors or ICs, etc. Do you have any idea what might be gone? I can make pictures, read names of the parts, or check some signals with scope if you need it. Don't ask me to check how good is High Voltage with the scope, though ;-)

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Re: Horizontal scanning does not work

You have high voltage. Horizontal sweep is not working. Mostly we see shorted sweep transistor. Mike

Posted on Aug 06, 2006

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Re: Horizontal scanning does not work

Man, i have the same problem, but with a ctr viewsonic monitor. all i can see is a line across the screen. That is a tipical problem of tv's, which i fixed very easily, but i cant fix this one. hope someone can help.

Posted on Aug 19, 2006

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Explain how the monitor buttons work

Monitor Icon Description of icon function moncont.gif Power - Turns the monitor on or off.
Brightness - Using this button or wheel the user can increase and decrease the brightness on the screen.
Contrast - Using this button or wheel can increase and decrease the amount of contrast on the screen.
Horizontal Size - Allows for the picture on the screen to be stretched to the horizontal edge of the monitor.
Vertical Size - Allows the picture on the screen to be stretched to the vertical edges of the monitor.
Horizontal Position - Allows the picture to move moved horizontally, once in the center the user can then use the Horizontal size to stretch it to have an equal amount of black border on each side.
Vertical Position - Like the Horizontal Position, using this button or wheel the user can move the picture up or down to center the picture more appropriately.
Full Screen - Sets monitor to full screen.
Degauss - This button will degauss the CRT, restoring possible color impurities. After this button has been pressed the degaussing circuit will be activated and then deactivated after a few seconds. Pressing and holding this button for a few seconds may cause your computer monitor to reset all data.
Corner and Trapezoid Correction - Using this button or wheel the user can either round the edges of the picture or move the picture inward like an hour glass or outwards.
Vertical Linearity - Sets the width of the vertical lines.
Moire - Removes or reduces the Moire effect, if any.
OSD Controls - If the monitor contains OSD controls, allows for the OSD menus to be adjusted.
Power Management - Allows the user to define the power management settings through the monitor itself and not the software.
Monitor Status - Displays the current monitor settings such as refresh rate and other settings.
Language - Sets the language on the monitor.

Aug 16, 2014 | Computer Monitors

1 Answer

My crt acer ac512 monitar only centre line view,c"not full view why?

there are several reasons why picture of crt monitors did not display good picture. if your monitor had horizontal line at the center of the screen?...the faulty is in the vertical deflection, check the vertical oscillator also the fusible resistors & capacitors around that section. if there had vertical line at the center of the screen?..check the horizontal deflection, horizontal output transistor also check the YOKE.

Jul 31, 2014 | Acer Computer Monitors

1 Answer

There is horizontal line come in TFT in last 2 yr i ask the dealer he told that its bcoz some resister short now after another line come in my TFT whats the problem? and notice that this problem come after...

You may have failing TFT (Thin Film Transistor, each pixel on the screen is driven by one transistor, so there are 100 of thousands on the LCD panel
) or bad connection or failing T-CON board.
See pictures here:
It will usually get worst with more lines as time goes by. New panel will be needed.

Jun 15, 2010 | Samsung SyncMaster 740N 17" LCD Monitor

1 Answer

My AOC 5en CRT monitor have a horizontal line whole screen... how i fixed it?

this is called hline problem. only a thin line is seen in the screen and the screen is black. the cabinet needs to be opened then it needs slight setting from the picture tube to get the whole picture.

Sep 05, 2009 | AOC CT720G 17" CRT Monitor

2 Answers

CRT Monitor Displays only a thin bright horizontal line

Vertical IC loose connection. Best is to reflux it or resolder. It is in internal circuitry inside the monitor commonly an upside single line IC.

And its a minor repair only. But I recommend it to be serviced by a qualified technician. Inside it are plenty of nasty voltages. It might caught you.

Apr 10, 2009 | Computer Monitors

1 Answer


If your picture wasn't pinkish or dark at the top or bottom when it was working, then it may be the inverter has gone bad. Inverters are like light bulbs and have life expectancies on the capacitors.
If your picture was pinkish or dark at the top or bottom when it was working then you may have 1 or more of the bulbs failing.

To get to the inverter:
Remove the stand.
Take the screws out of the bottom rear edge (these hold the front trim)
The the trim then unsnaps. {Be aware of the wire to the power button board on the bottom corner}
Start at the bottom and release the trim by lifting away from the glass of the screen from the center outwards to the corners, then work your way up each side bottom to top (a pocket knife or thin putty knife will help release the catches) These sides can be really tough to pop off especially the last top clip on each side.
Then unsnap the top edge (rocking it while lifting helps)
Disconnect the power button plug or unsrew the screws.
Once trim is off, remove the 4 corner screws that hold the screen in. Then the screen will lift up.
unplug the bulbs and wire to the screen (screen plug that goes into the metal case pulls out)
then the inverter is under the center area under the metal cover
Shout if you need more info.
If you email me a good picture of the inverter , I may be able to get a better idea if it is the inverter from a visual.

Dec 13, 2008 | Gateway FPD1975W 19" LCD Monitor

1 Answer

Shows half screen only!

if you can't expand your screen size from the pulldown menu or vertically or horizontally center the picture one or two of the centering coils could be partially burned out. the monitor uses electromagnets around the crt neck to center the picture. varying the center controls apply or take away voltage from the coils to center the image. may be time for a new monitor

Jun 08, 2008 | Compaq MV 540 15" CRT Monitor

1 Answer

Dell E171FPb monitor turns on, but that's it

Hi Letneper,

Hope this will give you hints. Some monitors have standby mode or screen saver feature and or self test feature when not connected to video input of your PC or CPU. Except this problem did not occur at first use. You can turn this off like other monitors manually at OSD (on-screen display) settings if available. No more no less if it works fine with PC or CPU on then there's nothing to worry.

Best regards,
Rosener Guyano

Sep 04, 2007 | Dell E171FPb 17" Flat Panel LCD Monitor

3 Answers

A thin horizontal line across the screen

I know I have seen thin lines in the past on older CRT monitors, these are usually wires which support the aperture grill. LCD is just a panel so this must be something different. What color is the line? It is probably an error in the scanning process.

Aug 01, 2006 | Gateway FPD1975 19" LCD Monitor

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