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My CTX model S761 LCD monitor flickers and I think it needs new bulbs. Do concur that is the problem? Where can I find new parts?

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The "bulbs" in LCD's are CCFL tubes. Similar to the long flouresent lights you see in office buildings etc.
If they are blown, then they don't flicker.
Chances are the inverter circuit, what powers those tubes, is failing and should be looked at by a qualified technician.

Hope that helps =)

Posted on Apr 09, 2008

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Posted on Jan 02, 2017

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Tip

Fix the flashing monitor


If your monitor shows the image for just a second and gets dark, but the image is still there and is visible when you look at the screen under strong light, then your monitor has an illumination problem.
To fix this you will need screw drivers PH2 and a flat one, soldering iron, multimeter and an electronic parts supply shop at a short distance. Also, basic knowledge about electricity and ability to unsolder and solder things are needed. Old working light bulb and it's invertor from a scanner also help a lot.
Take precautions against accidents. Get rid of unnecessary objects, keep family members out of reach, wear rubber gloves.
Open the monitor. You have to remove the stand, some screws on the back and to unlatch very tightly latched plastic latches. With covers down, look for blown capacitors on the power supply board and replace them. Usually they are 1000uF/35V/105C, 470uF/25V/105C. If the problem persist, test the light bulbs connecting one at a time and turning on the monitor. Be careful not to touch any live part of the power board. Look if some of them will not flash. Replace if any. You may have to open the LCD to replace a bulb. Be careful not to break the LCD glass panel and keep parts covered against dust. Before assembly look for dust and other objects on the parts of the LCD. Remove with compressed air. Do not touch with hands, blow with mouth or clean with liquids. All these will make the image look awful.
If the inverter includes ceramic capacitor, replace it. Check the transistors of the inverter. Replace if faulty.

on Aug 07, 2010 | Computers & Internet

1 Answer

Sony vaio desktop all in one back light not working


To fix your problem please follow the below given steps
Step1
Power on your computer and wait until there should be an image displaying on your LCD monitor. Look directly into the monitor from a distance of about 1 inch way. Cup your hands around your face to block out the light in the room and get a clearer view of the LCD screen. Check to see if there is a faint light visible in the screen, which will indicate that the cold cathode backlight has gone out, or no image at all, which will indicate a different problem.

Step 2 Check the manual that came with your desktopmag-glass_10x10.gif LCD monitor or navigate to the manufacturer's website and find the model of cold cathode bulb that the monitor uses as a backlight. Purchase a corresponding replacement bulb

Step3 Power off your computer and then remove the monitor cable from the port on the back of the computer case. Disconnect the monitor stand from the monitor either by pulling out the plastic latches or by removing the screws holding it to the monitor's casing.

Step4 Lay the monitor face down onto a stable work surface such as a desk or table. Take out the screws along the edges of the monitor's casing and set them aside. Lift the back side of the monitor case off of the monitor and set it aside. Check to see if your model of LCD monitor has the back light directly exposed on the lower end of the monitor or if it is hidden behind another plastic or metal piece.

Step5
Remove the screws holding the plastic or metal piece over the bulb if there is one present and set the piece aside. Check to see if your model of monitor keeps the bulb in a plastic casing or if it is soldered directly to the metal. Use a soldering tool to remove the solder or instead use a rotary cutting tool to cut into the clear plastic casing around the bulb if it is inside a case.

Step6
Slide the new bulb into the open spot on the monitor and either solder it in place or use a piece of tape to cover over the opening you made on the plastic casing with the rotary cutting tool. Place the metal or plastic cover back on if there was one and reattach the screws. Set the casing back onto the monitor and place the screws back in.

Step7 Put the stand back on the monitor and then reconnect it to your desktop computer. Power the computer on and wait for an image to appear on the screen to make sure the back light bulb was installed correctly.

Please rate me if this solution works for you

Thanks......Have a great time.

  • Step 2 Check the manual that came with your desktopmag-glass_10x10.gif LCD monitor or navigate to the manufacturer's website and find the model of cold cathode bulb that the monitor uses as a backlight. Purchase a corresponding replacement bulb.
  • Step 3 Power off your computer and then remove the monitor cable from the port on the back of the computer case. Disconnect the monitor stand from the monitor either by pulling out the plastic latches or by removing the screws holding it to the monitor's casing.
  • Step 4 Lay the monitor face down onto a stable work surface such as a desk or table. Take out the screws along the edges of the monitor's casing and set them aside. Lift the back side of the monitor case off of the monitor and set it aside. Check to see if your model of LCD monitor has the backlight directly exposed on the lower end of the monitor or if it is hidden behind another plastic or metal piece.
  • Step 5 Remove the screws holding the plastic or metal piece over the bulb if there is one present and set the piece aside. Check to see if your model of monitor keeps the bulb in a plastic casing or if it is soldered directly to the metal. Use a soldering tool to remove the solder or instead use a rotary cutting tool to cut into the clear plastic casing around the bulb if it is inside a case.
  • Step 6 Slide the new bulb into the open spot on the monitor and either solder it in place or use a piece of tape to cover over the opening you made on the plastic casing with the rotary cutting tool. Place the metal or plastic cover back on if there was one and reattach the screws. Set the casing back onto the monitor and place the screws back in.
  • Step 7 Put the stand back on the monitor and then reconnect it to your desktop computer. Power the computer on and wait for an image to appear on the screen to make sure the backlight bulb was installed correctly.

  • Read more: How to Diagnose & Repair Desktop LCD Backlight Problems | eHow.com http://www.ehow.com/how_5038642_diagnose-desktop-lcd-backlight-problems.html#ixzz0uJr4tmU8

    Jul 20, 2010 | Sony VAIO PCV-V200G PC Desktop

    1 Answer

    a


    You could have a defective screen - a defective inverter or a CCFL lamp.
    To determine if you have a LCD screen or video card problem, read this and follow the instructions.

    Defective CCFL backlight, it may have the following symptom:

    • Screen flashs on red/pink and off.
    • Picture stays on in red and slowly be come normal.
    • Picture flickering with dim display.
    • Picture flickering on and off.
    All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp

    Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.

    Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
    The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
    Check out www.lcdparts.net for parts, repair service and DIY info

    Apr 21, 2009 | Computers & Internet

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    Need bracket for ctx pv 720 monitor


    i got my bracket for mine at office depot and circuit city also caries them

    Aug 22, 2008 | CTX Computers & Internet

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    I have a Toshiba Satellite P100 laptop which I bought in New Zealand. I think the model comes from the USA. Part of my screen is flickering. It runs vertically from the top to the bottom of the screen and...


    Good morning, Kevin!
    Sounds like an LCD problem. You can verify this by hooking up an external monitor. The external monitor will probably show a good display.
    After verification of the problem,you may want to try to replug the LCD cable at both ends, just to see if that corrects the situation.
    If that resolves things, all is well and good. If not, you may need a replacement LCD.
    If the external monitor shows the same display, you may have a motherboard problem.
    Hope this information is of some help.
    Ron-

    May 09, 2008 | Computers & Internet

    1 Answer

    Hi, I have a problem with


    The high voltage (HV) flyback transformer is a very possible cause of this. This could be repaired by a qualified technician, but the cost may not be worth it. New 17" monitors can be acquired for free sometimes (think craigslist)

    Mike

    Mar 31, 2008 | Computers & Internet

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    Will Not Turn On


    connect external monitor and check if its works or not ,if ok your display will gone,still same problem i think motherboard problem

    Mar 27, 2008 | Computers & Internet

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    Moniter flicker


    Any monitor flickers at 60 hertz. The usual reason for being unable to use faster refresh frequencies is that the correct video card driver and/or monitor driver are not installed. Another possibility is that the resolution is set too high. Assuming Windows XP, right click on the background, choose "properties", settings tab, advanced button. Check to make sure your video card is named - the monitor is not as important but would certainly be helpful. If not, did out the CD's that came with them or download drivers from the manufacturer's website. On the other possibility, on the adapter tab, there ought to be a "list all modes" button so you can choose resolution and refresh rate at the same time. Your LCD monitor will be fussy about the resolution, so you may need several tries to get something that looks good and doesn't flicker.

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