Question about Acer Aspire 4520 Notebook PC

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Acer aspire 4520 we replaced the backlight and the inverter and we still have a black screen when powered up. if we connect and external monitor to the laptop it works fine. what is the problem?

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Sounds like you have got a dead screen or a bad ribbon cable,ribbon cable would probably the cheapest solution to try first

Posted on Dec 13, 2014

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Change the LCD screen...

Posted on May 05, 2010

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Acer aspire 5520G laptop,,the screen remains black,,starts up well just the screen remains black


Hi, this fault sounds like the screen backlight inverter has failed. There is not much detail in your question but start the laptop and watch the screen very closely. Watch for the windows logo to appear in the center of the screen. If you can see it but it is very dim then the backlight has failed. A replacement inverter is likely to cure this, it is usually mounted at the bottom of the screen assembly behind the plastic facsia. Also connect an external monitor and then try power up again. If you get a display on the external monitor then the inverter is the most likely cause. Check the connection cable as well before spending out on an inverter especially if the fault was intermittent before final failure. I will need more details to help more if this does not cure your fault.

Hope this helps

Steve at Olive Country Computers in Spain

Feb 15, 2011 | Acer Aspire 5520-5579 Notebook

1 Answer

My computer screen is black but power is on. What should i do?


This might be a sign of a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp.

Test with an external monitor attached to the laptop. If you get display on the external monitor, then this confirms the case.

Aug 21, 2010 | Acer Aspire One Netbook 8.9" Notebook

2 Answers

The screen on my Acer Aspire 4520 just went black and no longer displays anything. It just went out for no apparent reason, and the computer will power on and work plugged into an external monitor, but we...


Hello there:
These screens have a very fine neon tube that runs thought the screen
and over time these will blow out expecially if the lid is slammed down or the laptop has been dropped there is also a inverter that runs the tube that sits on the motherboard that can go out too But not too much
SO what you are going to have the screen or the inverter serviced and have the necesary parts replaced by a qualified technician ok?
I hope this has been very helpful for you>
Best regards Michael

Dec 21, 2009 | Acer Aspire 4520-5582 Notebook

1 Answer

Acer 5515 backlight not working also bootmanager missing


You need to fix the boot manager problem first by connecting an external monitor to the laptop so you can see and do a system repair.

As for the backlight problem :-
You could have 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

Aug 14, 2009 | Acer Aspire 5610-4648 Notebook

1 Answer

Acer 4520g minitor blackout


You could have 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.

Aug 14, 2009 | Acer Aspire 3680 Laptop

1 Answer

Computer is on, screen stays black


You could have a faulty inverter or a CCFL lamp, 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.

Jul 04, 2009 | Acer Aspire 3690-2196 Notebook

1 Answer

My monitor screen keeps flickering on and off. is there something that can be done to fix this?


You could have a faulty inverter or a CCFL lamp, 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.

Jul 02, 2009 | Acer Aspire 4520-5803 Laptop

1 Answer

MY ACER LAPTOP SCREEN TURNS ON BUT THE SCREEN IS BLACK


To determine if you have a video card problem or the LCD screen is at fault.
Connect an external monitor to the video port on the laptop and boot up your laptop, if you get a display on the external monitor then your video card is OK and you have a faulty LCD.

When you power your laptop without an external monitor and have a close look at the LCD screen at and you see a slight image then the fault is with the backlighting panel. This fault could be a faulty inverter or a faulty CCFL backlight lamp.

Defective CCFL backlight may has 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.
The inverter can be easily replaced so can the CCFL lamp (but requires a lot more work)
For info on parts and repair service goto www.lcdparts.net

Mar 02, 2009 | Acer Aspire 5610-4648 Notebook

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