My laptop LCD screen starts up and looks fine for about 10-15 minutes then begins to do what looks like bad reception on an old TV and sometimes freezes the image on the screen. If I gently squeeze the left side of the bezel the picture comes back sharp and clear. If I power down the laptop for 15-20 minutes it starts up and works fine for another 10-15 minutes. When the problem starts, I have tried a clothespin to maintain pressure on the left side bezel and that works for a few minutes but then goes bad again. I can move the clothespin up and down the bezel to "chase" the problem and that works but I have to move the clamp every couple minutes. I have looked inside and actually pulled the LCD out of the bezel to wiggled the video connection and inverter connections but they don't cause/cure any LCD problems. The only thing that seems to work is applying pressure to the left side of the bezel or LCD frame directly, pressure on the top, bottom or right side does nothing. Also, when the computer starts up and is working fine, moving the laptop or changing the screen position has no affect on the image but once the problem starts, movement will increase or sometimes correct the problem. When I connect an external monitor I have no issues at all on the external screen even when the laptop screen is "wigging out" or freezes. Any help or suggestions are greatly appreciated. Thanks
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Re: LCD screen looks like bad TV reception
If the display returns to normal when you press the bezel at on end means there is a bad connection to the inverter behind the bezel itself or the inverter is ready to give up the ghost. you can attempt to dismantlethe laptop and remone the lid or in some cases just unscrew the bezel and remove the plastic cover, the inverter is at the bottom of the display you can't miss it
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Yes, this unfortunately is the beginning of the end of the LCD screen, you see the "Driver Circuit Transistors" are starting to go faulty... this is a very common problem, occasionally, it may be the Video card, you will have to "monitor"...(pun intended), the situation. If it continues, as I expect, and lines appear down across, the screen that never go away, and are RED or BLUE or GREEN, then it is most definitely the LCD itself, if however they go away come back in differing places, then it is more likely the Video card. replacement is the only fix sorry. I would wait until it is unbearable before you do anything.
Try these troubleshooting tips and see if it helps....
Laptop is dead. How to troubleshoot the problem. In this post I’ll explain how to troubleshoot a dead laptop and find the problem. The following troubleshooting tips are not model and brand specific, they should work for most laptops. Let’s take a look at two different scenarios. Example 1. The laptop is absolutely dead. When you plug in the power adapter and press on the power button, there is no signs of life at all. The laptop will not make usual noises, LEDs will not light up, the fan will not spin, the screen is blank and black, etc… In short, the laptop is dead. What you can do in this case? 1. Make sure the wall outlet is working and the laptop DC adapter is getting power from the outlet. Try another wall outlet. 2. Test the laptop DC power adapter, make sure the voltage output is correct. You can test the DC power adapter with a voltmeter. 3. Let’s say the DC adapter is fine and the adapter outputs correct voltage. In this case unplug the power adapter from the laptop, remove the battery, wait for 1-2 minutes, plug in the adapter and try turning on the laptop again. OK, you tested the adapter and it’s bad. If you decide to replace the original DC adapter with a generic one, you’ll have to follow this rule: The voltage output on your new adapter has to be exactly the same as on the original adapter. The amperage on the new adapter could be the same or higher. If nothing helps and the laptop is still dead, apparently the motherboard is fried or there is a problem with the DC power jack. It’s possible the DC power jack is broken and the motherboard is not getting any power from the adapter. In this case you’ll have to disassemble the laptop and replace the power jack. Example 2. When you plug the DC power adapter and press on the power button, the laptop starts making normal noises, the LEDs work properly but noting appears on the screen. The laptop will not start. First of all, take a closer look at the LCD screen. Look at the screen under bright light. It’s possible that the image is still on the screen but it’s very faint. If there is no image on the laptop LCD screen, test the laptop with an external monitor. Connect an external monitor to the VGA port on your laptop and turn the laptop on. You can toggle video output between the internal LCD screen and external monitor by pressing Fn and F4 keys simultaneously on HP laptops, Fn and F5 keys on Toshiba laptops, Fn and F7 keys on IBM laptops. Other laptops may use different key combinations. Let’s say the external monitor works fine but the internal LCD screen has no image at all. If that’s the case, your problem could be related to the LCD screen or the video cable. Also, make sure the video cable makes good connection with the motherboard and the LCD screen. Try reconnecting, reseating the cable. In my case, both internal and external monitors were absolutely dead. Neither of them had image. That means the problem is not related to the LCD screen or the video cable. From my experience I know that this problem could be related to the laptop memory. Try reseating the memory module, maybe it’s not making good connection with the memory slot. Try cleaning contacts on the memory module with pen eraser. Try moving the memory module into another slot. Try replacing the memory module with another known good module, it’s possible that your original module is dead. If you have two memory modules installed you can try removing them one by one, it’s possible that one of the modules is bad. Try installing different memory modules into different memory slots. In my case reseating, swapping the memory module didn’t help. I was pretty confident that my problem is not memory related and I moved on. Try removing battery, hard drive and DVD drive and turning on the laptop without these components. Also, try turning on the laptop with an external monitor when the video cable is unplugged from the motherboard. If the laptop start with video on the external monitor, apparently there is something wrong with the laptop display panel. Finally, disassemble the laptop and removed the motherboard. 1. Motherboard. Like on most laptops, in my case the video card is integrated into the motherboard 2. CPU with heatsink and cooling fan. 3. Known good memory module. 4. The power button board witch you need to turn on the system. 5. Working DC power adapter. Still cannot get any video on the external monitor. The system turns on, the cooling fan starts spinning but there is no video. At this point I’m 95% sure that the motherboard is dead. CPU failures are not very common, so it must be bad motherboard.
on the back of the LCD is a cable that goes from there to the Motherboard. Try reseating that cable on both ends. If that doesn't fix it then it has to be a problem with either the screen or the cable behind the screen.
Once you see lines on the lcd that defitinely means the lcd is bad. As far as the board to the lcd, that would be behind it but with all the delicate tiny IC's on it, its would be near to impossible to troubleshoot it and start replacing components cause its done by machine and the legs of the IC's have match up perfectly with where your going to solder it into place.
Inverter is good, when ineverters go bad its either you get a dim screen, weird colors, or even a white screen.
My suggestion, definitely get a new lcd put in there since your getting lines in the lcd. Also your lcd cable could be flaky as well but those are cheap so getting one of those isn't a problem. Get those two things replaced and your laptop should work like new.
try plugging into an external monitor.. if the screen looks ok then it is most likely the laptop LCD screen is bad.. had the same thing on a HP laptop .. replaced the screen and all was well again with the world...