Question about Sharp Actius A250 Notebook
Just wondering if the screen can be replaced... It doesn't light up at all. Otherwise the computer still works fine. It may be something on the board but I'm not sure what to check.
I'm a laptop technician and this is a very common fault. It sounds like the backlight or invertor for the laptop screen has failed.
The easy way to check this is to plug the laptop into a normal PC monitor (if you can) via the monitor out port on the laptop - you may have to press Ctrl + F5 to get a display on the PC screen. If you can get the laptop to show an image on the PC screen then the main laptop itself is fine, and the problem is almost certainly a failed invertor or backlight.
Assuming you *could* see an image on the PC screen, you should then press Ctrl + F5 so that you *can't* see an image on the PC screen any more (this is very important). Next unplug the laptop from the PC monitor (if you did the above) and look VERY closely at the laptop screen. You will hopefully *just* make out a very, very feint and very dark image on the laptop screen. Bear in mind that you may need to re-boot the laptop to get a moving image that you can detect (like the Windows boot up screen for example). If you *can* see a very, very dark and feint image on the screen then the backlight has failed. If the screen is plain bright white or there is no image then the invertor has gone.
The invertor is a smaller circuit board that sits in the screen housing, the backlight is a very thin "flourescent" kind of tube light that is built into the screen itself. The invertor can be removed and replaced pretty easily by most competent people without much trouble (takes maybe 30-45 minutes to do). The backlight on the other hand is very hard to remove without damaging the screen itself and should only be attempted by a specialist laptop repair company.
I hope this helps.
Posted on Jan 04, 2009
First plug an external monitor and toggle the screen with ALT+F5 to make sure the rest of the hardware is working. If the image in the external monitor is Ok you probably have a hardware problem in the inverter or the LCD screen.
You can get the replacement parts here, and change it yourself:
Posted on May 23, 2008
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