When I power on my laptop I can see the Acer boot screen, the Windows loading (or resuming) screen and eventually the desktop. This is short-lived though as the screen only stays lit 3-4 minutes at the most. Once it goes black I can still see whats on the screen if I turn it a certain way, and it works fine w/ an external monitor. It will also come back on if I toggle the fn+f6 but then it goes right back off. I have replaced the inverter once about 4 months ago because the screen was flickering and flashing. The replacement inverter stopped all of that nonsense, but now this has started. Did I just get a crappy inverter and need to replace it again or is it time to think about replacing the backlight?
It sounds like the inverter to me.
Shine a flashlight on the dark screen to see if you barelysee the icons on the desktop. If so, then the LCD Inverter is bad.
Plug in an external monitor and see if the display shows up on it. It can beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout you having to do anything. Some systems will require you to hit the FN(Function key) + F1 thru F12. Hold down the FN key then hit the correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally have CRT/LCD on it or it will have the icon of a display.
If you see no icons by shinning a flash light and the external monitor works,then your screen is bad. If you see no icons by shinning the flash lightand nothing shows on the external monitor, then most likely your video card isbad.
SOURCE: Toshiba Sate. M35X-S19 - Blank Display
It is more than likely that it is the display that is the problem.
And your original problem may have been the display and not the motherboard.
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Thanks
SOURCE: Ihave an acer 9410Z laptop the backlight won't
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
SOURCE: Right now, my laptop screen is black. I can hit Fn
I'd guess that it's the CCFL (backlight bulb) going bad. What points me in this direction is that you mention that the backlight (when you're able to get it to turn on) isn't producing bright white light (and pink is one of the colors that normal fluorescent tubes produce when they're failing). You're in luck because CCFL backlighting isn't the most difficult thing in the world to replace (if you can handle delicate electronics) and you may just be able to hack together some LED backlighting for yourself while you're at it. There are a few reasons that LED backlighting is better than CCFL but the most important is that LEDs last pretty much forever.
There are a number of video tutorials on YouTube about replacing the backlight of an LCD display and a few of them detail the installation of bright-white LEDs in place of CCFL backlights. If soldering and math aren't your strong suits a drop-in replacement for the CCFL tubes should be fairly easy to find online...
SOURCE: Acer Aspire 5100 Laptop Screen Works Intermittently
Since you have video with an external monitor your lcd panel is going out.This is not hard to repair only costlyhttp://www.insidemylaptop.com/remove-lcd-screen-replace-inverter-board-acer-aspire-5100-laptop/
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