I am having a problem with my screen. It has some sort of bad connection in the screen or behind the screen. Some times the screen will have some horizontal lines and some times it will start going white with fine black spots. This might sound bad, but if you tap the back of the screen you can get it to clear up. I'm resonably sure its not the inverter. Thanks
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Re: Problem with screen
Hi there Obviously a disgruntled Fixya member!!!
Ok, it sounds like you just have a bad connection either at the inverter end (bottom of screen) ot the cable that goes to the top behind the screen has worked loose. To fix this, you might have to remove the lid from the base of the laptop, but i find that unscrewing the bezel (plastic that surrounds the screen) and removing the plastic and re-seating the connections again, you have to be carefull though as the ribbon cable behind the screen is fragile.
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Sounds like a bad connection. You will have to open the laptop and verify the connections, front and back of the screen. The ribbon cable behind the screen can sometimes lose contact causing that issue. A bump, drop, jar, will cause the connections to come lose a bit. Use a Can of Electronic Contact Cleaner spray to clean the connections and reseat. If you don't feel comfortable opening the Laptop, take it to a Qualified Computer Tech. Have you connected it to a External Monitor to verify the Graphics Adapter is working correctly?
It could be the on/off switch that turns on/off the monitor when you open and close the lid. If the hinges are lose, damaged due to a drop, jar or have dust, dirt, etc. it will get stuck. If you have canned air clean around the hinges. Also there is a ribbon cable behind the monitor and a backlight at the bottom of the monitor. This video will give you the idea: http://www.youtube.com/watch?v=2Yi6GNFcP3w
Flickering typically means a bad connection somewhere. If the machine is staying on and only the screen is flickering, it may be the hinges. If you move the screen back and forth, does it change the flickering? If so, the hinges can be sprayed with contact cleaner (availabled at frys or radio shack). If not, it may be another bad connection of some sort such as the connector for the screen. This will involve taking the case apart (lots of tiny screws) and turning the machine on while you wiggle the multi-wire connector that goes to the screen. Be careful not to shock yourself or shock the circuit boards with static. Avoid touching any metal inside the case. If you discover a bad connection, you can then use contact cleaner to try and fix it. Worst case, it could be crack in a weld on the motherboard. Hopefully not. Good luck!
1. Test using an external monitor. If it works, then either the screen bulb or the inverter board might be defective. 2. Test the inverter board. Easiest way to do it if you have a good screen with a good bulb. Connect the good screen to the inverter board & test it. If it lights up, then the inverter board is good. If it did not, then the inverter board is bad & needs to be replaced. 3. If the inverter board is good, then we are left with the possibility that the screen bulb is bad. To fix this, we will need to replace the LCD screen.
Sounds like you may have lost the screen inverter. The inverter is a small electronic board that sits under the lcd panel behind the screen bezel. It takes the DC power from the power adapter and converts into the high voltage AC power for the backlight that illuminates the panel.. Since you can still see the Windows logo, that would mean the video card and mobo are still working. Unless the laptop was dropped or has taken a hit, I would doubt the bulb has been broken or burned out, although that could still be the case....I would lean more toward an inverter failure or a loose connection of one of the wiring harness plugs that connect to the inverter. These wiring harnesses are very close to the hinge assemblies and can time to time be pulled loose or ground themselves out by rubbing the wiring bare. Remove the bezel from the screen and inspect the wiring at the hinges as well as the plugs leading into the inverter.
Yes you are correct. I would say 95% of the time, you will need a LCD screen replacement. Also be sure to disconnect and reconnect the lcd cables, at the motherboard and behind the lcd itself, just to make sure the cables aren't making bad connection.
I have provided you a link to MANY lcd screen for your laptop on EBAY.