Backlight flickering hi, screen backlight on my acer travelmate 5720 keeps flickering, any easy way to solve this, cheers, Norman

Maybe the 'inverter' is blown on it. This is related to the backlight of the LCD style screen.

You may have a defective CCFL backlight, it may have the following symptom: Screen flashes on and off or displays reddish pink hue. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickers 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 replace the CCFL lamp.
To determine if the video card or the LCD is faulty, connect an external monitor to your laptop and power the monitor up first then the laptop, 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. It could be a faulty inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out; usually the CCFL lamp fails before the inverter.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out LCD Parts for service, parts, and DIY info Use this link to their WEB site: -
www.ladparts.net

try using your function keys to swtich between screens and see if it comes back on, you might need to also refresh your connections on you blacklight board

The fault could be a faulty CCFL lamp or inverter.
To determine if you have a LCD screen, inverter or video card problem, read this and follow these 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 or appear black. 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 the monitor up first then the laptop, 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.

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.

If this happened suddenly, the backlight power supply (inverter)  has probably failed. It could be the backlight itself but they normally will dim or flicker before they die.
Try shining a light at an angle on the display with the computer turned on and look at it from an angle too. You may be able to see video very faintly; if you do, then it is as described above; a backlight problem, not the LCD display itself. 

http://www.laptoplcdpanel.com/productlist.php?cname=Acer_Laptop_LCD_Screen
new lcd screen between $125 and $150
sometimes not easy to install

This doesn't necessarily rule out the inverter. I've had inverters with intermittent problems that had the same effect, so having the inverter tested is the only way to rule it out. Other possibilities are a bad connection, a corroded/dirty pin or socket in a connector, a bad ribbon/cable, and a failing backlight. If it is a failing backlight, the entire screen will need replaced, as the screen is considered a sealed unit and the backlight isn't available and not considered a replaceable item. Also, it's rare, but it could have a faulty motherboard component or video card. I'm leaning towards a faulty backlight, but keep in mind the inverter and cable possibility. Start by checking and cleaning all connections.

hello Aznarel,

Firstly we need to establish if the problem is caused by the notebook's display or by it's on board graphics adapter. To do this I need you to connect an external display to the notebook. I see that the 292 has a VGA I/O port to which any VGA display can be connected.
When the notebook's screen is displayed on the external display one of two scenarios may be experienced:

1. The problem's symptoms may manifest on the external display, indicating a problem with the notebook's on board graphics adapter. Since this problem can only be solved by replacing the notebook's motherboard, it may be more economical to buy a new one, depending on the status of the notebook's warranty.
   
   
2. The problem's symptoms are not experienced when the screen is displayed on an external display, indicating a problem with the notebook's display. If this is the case I will suspect a malfunctioning inverter.
   Reason: When the LCD TFT display starts flickering it is a sign that the backlight is not receiving the correct current (the inverter provides the backlight with the required current).
   As opposed to a malfunctioning backlight. When a dark, faint output display is the only experienced symptom (that is; no flickering of the screen and no lockup of screen display) the LCD's backlight is at fault
   In case of scenario 2 the solution will be to take the notebook to a computer repair shop where a certified IT technician can order and replace the malfunctioning inverter.

I hope you find this information helpful in solving the problem.
Please take the time to rate this solution.
Kind regards and thanks for using the FixYa service.

Its a florescent backlight and is an integral part of the LCD screen.
You need to replace the entore screen, not just the backlight.

I hate to tell you this, but unless you can find a screen on E-bay or similar site it is going to cost you almost as much as a new computer.
You can buy a used travelmate 240 for around $200 and drop yyour hard drive into it and be up and running as before in a matter of minutes. Then you may be able to sell the old one as a working base with a bad screen to recoup some of what you paid out.
Good luck.