Question about Sony VAIO FX240 Notebook

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Laptop i need some tips. my laptop fell and from that time on the screen turned black but if your going to look closely at the background, images are still present and the laptop is still functioning/running.

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  • Comptime Dec 15, 2007

    My computer boots fine then in less than a minute, the screen goes dark as if a blank screensaver were activated. If you look closley, the images can be seen however very, very dark. Having this issue for a while, I've overcome it by pressing and releasing the sleep button (the black pin that is depressed when the lid is closed). That worked for a while however now nothing works. It was never dropped or damaged but on 2004 (when I had the same problem and it was under warranty) the FL inverter was replaced. It worked fine for 2 years then started to act up again. Should I be looking to replace it again? Also...is there a step by step blog to show me how? Thanks,



    Comptime1@aol.com



    (Barry)

  • Comptime Dec 15, 2007

    My computer boots fine then in less than a minute, the screen goes dark as if a blank screensaver were activated. If you look closley, the images can be seen however very, very dark. Having this issue for a while, I've overcome it by pressing and releasing the sleep button (the black pin that is depressed when the lid is closed). That worked for a while however now nothing works. It was never dropped or damaged but on 2004 (when I had the same problem and it was under warranty) the FL inverter was replaced. It worked fine for 2 years then started to act up again. Should I be looking to replace it again? Also...is there a step by step blog to show me how? Thanks,



    Comptime1 (Barry)

  • sasha123 Jan 07, 2008

    the laptop fell and the screen is all messed up. it starts up fine its just i cant see anything. i've tried looking for the lcd number to get a new one but i cannot fing it.

  • john delisio May 26, 2008

    when i start the laptop i starts up fine but i can't see anything because the screen is all messed up

  • hooya27 Aug 29, 2008

    My laptop backlight works intermittently when I first turn it on. After it is warm, it seems okay, or if I fiddle with the cover button, it will come on. It is a pain in windows, because windows goes to sleep mode (windoze!). In GNU/Linux, I can just flick the button for a while and it comes on and stays.

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I have a Compaq Armada 110 PIII that had a dark screen. Fiddling with the cover closed button would sometimes bring it back. If I turned it on and waited for a while, it would flicker on and stay. Finally I got so fed up with it I downloaded the (free on HP's site) repair manual for the 110. I took of the button/indicator cover (no screws, just pry it up) and below the cover button was a big hole, and a black rectangular switch. The switch had a plunger on it, but it was stuck down. I tried to pull the button up, but it just came completely off the board. Since it is a switch, and it is make to function, I reassembled the laptop, and voila! BACKLIGHT IS FINE, RIGHT FROM CMOS! So what if I don't have that button functioning - I don't have it MALfunctioning anymore!

Posted on Aug 29, 2008

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There is another solution. Only if you cant afford to repair it. If you have a spare monitor laying about plug it in to the laptop believe me youll still get some more glorious hours from that laptop until you might drop the monitor WOOPS....

Posted on Sep 03, 2007

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Most likely the backlight is not working. Replacing backlight could solve the problem.

Posted on Jul 22, 2007

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When your laptop screen is black but you can faintly see whats on the screen your backlight is not working. It could not be working for a couple of reasons. The power inverter could have come unplugged. This supplies the higher voltage necessary to power the screen. The switch could be stuck. This is the switch that tells the laptop the lid is closed. I have seen on many models where the rubberized plunger that shuts off the LCD becomes jammed and it perfectly mimics a faulty inverter. For a drop I would say check the lid switch first then the inverter. Hack

Posted on Jul 09, 2007

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The backlite of LCD displays are cold cathode flourescent lamp. I've open quite a lot of notebooks and LCD displays and here is what I can share: 1. The lamp itself is flexible (not glass).Only the LCD is glass. 2. the backlight is powered from an inverter with only 2 wires via a connector. 3. The HV inverter for the backligh tsupply have a small transformer with ferrite core. The possiblities of damages are: The connector supplxing power to the backlight turned loose, or the inverter transformer was detached from the PCB or the core is broken. At least you can still use the notebook with external monitor in case the display is not fixed.

Posted on May 24, 2007

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Backlight is dead. Remove the screen pannel, open it and replace the small tube you will find after making it pieces completely.

Posted on May 24, 2007

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Seems that 1 something could have been knocked lose or 2 there is a break in the back of the screen that you can't see..It will have to be serviced either way....When it fell is the only way of knowing how much the prob could involve...hard fall from high or small fall from very low..crash to bump makes the diff of what the prob can be in all laptops...

Posted on Nov 27, 2006

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Posted on Jan 02, 2017

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1 Answer

Acer fell on floor flickering screen & lines across screen


It sounds like the screen broke when it fell. You'd need to get the screen repaired. Your best bet is to have someone else do it for you. Search for computer repair in your area. Sometimes places that repair broken cell phone screens can also repair laptop screens.

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I had the same problem. While rebooting the laptop the screen would be on for a few seconds after it finished rebooting then the display would go black. If you looked very carefully at the screen you could see the image was there but there was no light behind the screen to make the image visible.

I removed the black plastic display bezel cover that goes around the edge of the display screen to check out the lights and wiring. I found a small magnet that belongs inside the display bezel had fallen out of it's slot in the plastic bezel and was stuck to the inverter pcb (printed cicuit board). To fix this problem I secured the magnet into it's slot inside the display bezel with a bit of glue. After fixing the problem and putting the display bezel back together the laptop worked normally.

The magnet could possibly fall out if the laptop was closed and upside down then dropped on a hard surface. Mine did not feel very secure in the mounting slot which is why I secured it with glue.

This magnet is how the laptop knows the lid is closed. When the laptop is closed the magnet is moved closer to a magnetic switch on the inverter pcb and activates the switch. The laptop thinks it is closed and shuts off the lights behind the display screen. When the magnet fell out of it's slot and stuck to the inverter it activated the magnetic switch all the time whether the laptop was open or closed. This caused the laptop to think it was closed and shut off the lights behind the dispaly screen as soon as the reboot finished.

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I have lenovo g550...my screen flickers in every 5minutes...


Failing Inverter An inverter, typically found inside a laptop computer, consists of a small board, which has impregnated electronic circuits stamped on it. Inverters look like thin boards about the of two sticks of chewing gum. The inverter and its bulb control the intensity of the liquid crystal display, which lights the screen monitor. The computer can control the output voltage of the inverter and either lighten or darken the screen. A special type of inverter can adjust the brightness of the screen by using an internal sensor to judge the room brightness, and then adjust the screen accordingly. Failing inverters give off some specific warning signs, which can be recognized by observing different screen characteristics.

Short Intermittent Display Upon turning on the laptop, the screen flashes on in the normal mode for a short period and then blinks to black. A very faint image appears in a dark background, which will be very hard to see almost invisible. After shutting off the laptop and restarting, the same mode occurs, where the screen appears normal for a few seconds then fades to black. This condition points to a failed inverter. To confirm this, plug in an operational external monitor; if the external monitor functions, the inverter has failed. b> Total Blackout with Ghost image b> The laptop turns on, as indicated by the power supply button, but the screen comes up black. The screen comes up black after restart. You might be able to detect a very dim or ghost-like image on the monitor. When you plug in a known functioning external monitor, the external monitor operates normally. This mode of display indicates a failed inverter. b> Long Term Periodic Operation b> With this failure mode, the laptop screen illuminates normally upon start-up and remains that way after several minutes, hours or even days, until it goes very dark again. Brightness controls or restoration attempts do not work. Most often, the screen will function normally with a computer restart, but will eventually return to black. Faint ghost images might appear, as seen in the total blackout mode. b> Dark With Color Variation b> Upon computer start-up, the monitor shows black or dark gray, accompanied by very faint images. The screen might have an intermittent color change, or remain on with a non-standard color variation, like pink or red. b> Auto Control Switch b> If the screen appears black, with no faint or ghost images, look for the lid switch near the back hinge. The switch, when depressed with a closed lid, shuts off the computer and monitor functions. Sometimes the switch becomes stuck in the closed position, disallowing the computer and monitor to turn on when opened. Pushing the switch manually several times can often free it up. If the switch tab has broken or jammed inside the case, it needs replacing. b> Loose Connection In this mode, the display looks normal upon start-up, but tapping the side case of the computer turns the screen black. More tapping results in the screen functioning normally then cutting out again. This condition points to a loose wire connection from the inverter to the LCD backlight lamp, or the video cable. The connectors can be accessed by removing the monitor bezel screws and pulling the plastic retainer off. Both connectors can be cleaned and refitted.

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I had the same problem. While rebooting the laptop the screen would be on for a few seconds after it finished rebooting then the display would go black. If you looked very carefully at the screen you could see the image was there but there was no light behind the screen to make the image visible.

I removed the black plastic display bezel cover that goes around the edge of the display screen to check out the lights and wiring. I found a small magnet that belongs inside the display bezel had fallen out of it's slot in the plastic bezel and was stuck to the inverter pcb (printed cicuit board). To fix this problem I secured the magnet into it's slot inside the display bezel with a bit of glue. After fixing the problem and putting the display bezel back together the laptop worked normally.

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74aa5d08-ab1b-415f-b65b-e5730298479e.jpg

d9a5bae7-b43c-4797-8790-a1d667831be9.jpg

0bff3520-95d0-4d35-9d8a-c5e3e0d627fd.jpg

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1 Answer

Im a user of Laptop nc6230 for long time , not i found a problem with my laptop. Same time when i switched on the laptop, i can hear everything sound,fan but the screen remain blank. And some time it...


@rashid386

If you turn the computer ON and you can hear that something's running on the background but there's no display , this is a sign that the screen's FL Inverter (this is the chip that controls the backlight of your LCD) or the LCD screen itself is already wearing out and needs to be replaced. If you can see a background image but there's no backlight - you need to have the FL Inverter replaced. If the screen is all black, you may need to have the LCD screen replaced. If you know your way around the computer, you could order screen replacement here and disassembly guide here.


Good luck.

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I had the same problem. While rebooting the laptop the screen would be on for a few seconds after it finished rebooting then the display would go black. If you looked very carefully at the screen you could see the image was there but there was no light behind the screen to make the image visible.

I removed the black plastic display bezel cover that goes around the edge of the display screen to check out the lights and wiring. I found a small magnet that belongs inside the display bezel had fallen out of it's slot in the plastic bezel and was stuck to the inverter pcb (printed cicuit board). To fix this problem I secured the magnet into it's slot inside the display bezel with a bit of glue. After fixing the problem and putting the display bezel back together the laptop worked normally.

This magnet is how the laptop knows the lid is closed. When the laptop is closed the magnet is moved closer to a magnetic switch on the inverter pcb and activates the switch. The laptop thinks it is closed and shuts off the lights behind the display screen. When the magnet fell out of it's slot and stuck to the inverter it activated the magnetic switch all the time whether the laptop was open or closed. This caused the laptop to think it was closed and shut off the lights behind the dispaly screen as soon as the reboot finished.

74aa5d08-ab1b-415f-b65b-e5730298479e.jpg

d9a5bae7-b43c-4797-8790-a1d667831be9.jpg

0bff3520-95d0-4d35-9d8a-c5e3e0d627fd.jpg

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