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Re: Turned on system. it shut off. tried to turn it on...
If every segment on the display lit up it will need a display driver IC (pain in the a## to replace need to remove the display to get at it) and it will also need a transistor in the power supply.
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The following applies to Acer Laptops... If the power indicator is lit but nothing appears on the screen - The computer's power management system automatically blanks the screen to save power. Press any key to turn the display on. If pressing any key does not turn the display back on, check the following.... 1. The brightness level might be too low. Press Fn and the right cursor key to increase brightness level 2. Display device might be set to an external monitor. Press Fn and F5 to toggle to the internal display 3. Backlight might be turned off. Press Fn and F6 to turn on the backlight. 4. If the Sleep indicator is lit, the computer is in Sleep mode. Press & release power button to resume.
Look at the power indicator:
If it is not lit, no power is being supplied to the computer. If the computer has a battery, it may be low and unable to power the computer. Connect the AC adapter to recharge the battey pack and make sure the AC adapter is properly plugged into the computer and to the AC power outlet.
If the power indicator is lit, check if a non-bootable (non-system) disk or USB thumbdrive is in the computer. If so, remove it and press Ctrl + Alt + Del to restart the system.
Pressing F2 by itself is only used to enter the system's BIOS on startup. If the power indicator is lit but nothing appears on the screen - The computer's power management system automatically blanks the screen to save power. Press any key to turn the display on.
If pressing any key does not turn the display back on, check the following....
1. The brightness level might be too low. Press Fn and the right cursor key to increase brightness level
2. Display device might be set to an external monitor. Press Fn and F5 to toggle to the internal display
3. Backlight might be turned off. Press Fn and F6 to turn on the backlight.
4. If the Sleep indicator is lit, the computer is in Sleep mode. Press & release power button to resume.
Try connecting it to an external monitor.
When you do, as soon as you press the power button to turn on the laptop, close the laptop lid - as this forces the laptop to display on an external monitor.
If this works, then it means the laptop screen is bad.
If it doesn't, the most likely cause would be that the laptop video card went bad.
For a while, some older Dell laptops with high-end nVidia graphics cards tended to die suddenly.
There are dozens of possible root causes for your problem I guess.
But exactly the same happened to me in fact on a packard bell laptop. After my son forced it to reset, it didn't start again. Only one led was lit. After a long search I found that the battery had died and this prevented the laptop to start even when the power supply was plugged in.
Try this: remove the battery, connect it to the power supply and restart.
1st - Try pressing <Fn> + <BrithnessUP> keys a few times, (on HP <Fn> key is between <Ctrl> key and <Windows> key, <BrightnessUP> key is <F8> key and <BrightnessDown> key is <F7> key. If nothing happens try the 2nd one.
2nd - Plugin external monitor, (type and size doesn't matter). Turn on your laptop. If you can see desktop on the external monitor, your
drivers are o.k., The problem is your laptop display, NOT the graphic chip.
you may have loose wiring or perhaps the board has had it and needs replacing i recommend repairing from a professional tec should not cost any more than $50 to fix
$38 part from Sears PartsDirect took about 30 mins to install. Part # AH92-02673A Ay pcb-front. There are actually 2 boards to this setup, I went ahead and replaced both but the power button side of the board has some wiring that requires you to remove the disc changer which is only 4 screws and 2 screws for the piece that holds the disc above the reader.
I couldn't find an easy way to get the knob off on the front it required me to force it, nothing borke but your replacing the board anyways..
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