Display not working correctly
Laptop LCD display image distortion / artifacts
Hi everyone,
I have an issue with the laptop's display:
- The colors and contrast on the laptop screen flicker and distort when the screen / lid is moved, flexed or pressed.
- When the distortion comes up, only bending / pressing / moving will restore the good image.
- The image might become unstable by itself (without tampering with the screen), in which case the paragraph above needs to be applied.
By researching and googling I managed to narrow down the problem into two possibilities:
- The flex cable that connects the LCD to the main board might be damaged.
- The LCD display itself might be damaged.
I am uncertain about which one is it, so I turned to the HP forums for advice.
I will present here my conclusions and what I have tested (and why I am uncertain):
First I started off my reconnecting and reseatting all the cable connections, so it is not a loose cable.
I also tested an external monitor, no problems.
Movement on the main board and its video connector also does not affect the problem. Board part is OK.
The problem persists in BIOS, it is definitely an hardware problem.
The slightest touch on any of the corners of the screen and also the bottom part (causing a very slight bend) affect the image display.
With the opened computer, moving the cable while the display is on causes sometimes distortion if the moved part is near the screen (the near it is to the connector, the greater the probability of causing distortion, albeit small), which leads to either three possibilities:
- The cable is damaged near the connector (seems unlikely, this part is never subjected to stress), which could explain why moving it there causes some distortion (but less than bending the screen).
- The LCD screen is damaged and sensible to movement, because moving the cable near the connector slightly applies forces on the LCD screen (bottom part where the LCD circuitry is), also explaining the image distortion.
- The connector pins have some problem and any slight movement coming from either the cable or LCD might disrupt the image (however, the connector appears to be in pristine condition, never been tampered with before and looked neat and clean, all the pins straight and new-looking).
Causing any bend at all to the LCD seems to disrupt the image, or sometimes correct it if it is already disrupted. It seems to happen even if I avoid as much as possible to cause movement on the cable / connector, but there is no way to be sure because any movement on the screen might slightly / residually move the connector / cable zone.
Therefore I am more inclined to believe it to be related to the LCD, because it seems to be the most sensible to movement (sometimes it starts to flicker by itself until I bend it or move it to make it stop).
However, one cannot be sure, since the LCD's controller circuits are on the bottom, including the zone where connector and cable are. Also the positioning of the lid can fix the problem, but it seems to be a coincidence because to move the lid I need to apply pressure on the screen, and no lid position fixes the problem, I have either to keep pressing the screen or moving the lid back and forth until the image is acceptable...
Is there any other way of troubleshooting?
Is the next step purchasing either a new cable or a new LCD?
Parts:
LCD screen / Display panel - 720557-001
Display panel cable - 720536-001
Thank You for your help in advance.
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Hello, I'll just start this off by saying I'm new to this community.
I don't really know anything about laptop things but I do alot of research when I encounter a problem.
So, 3 weeks ago, when I woke up, half of my laptop's screen is darker than normal. So I took it to a local repair store, they said that my LCD is broken (which I was too gullible to believe). So, I just left it and ignored the problem (because LCD costs an arm and a leg in my country).
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The picture below is what my screen looks like, I'm using an external monitor and I can see the screen clearly.
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This HP 2245w monitor has been used without any problems for a number of years originally, connected to an HP Desktop and now connected to an HP Spectre Notebook via an extension device. I am using three displays with the integrated notebook screen as the main display, the HP L2245w as the secondary display and a Samsung Synchmaster as the tertiary display. This setup has been successful since I moved over to the notebook about a year ago and this is the first time I have had a problem.
I was doing some basic (no pun intended!) Access VBA development when the screen went black.
As far as I can tell this is the current situation:
1) The input used is DVI connected with an HDMI to DVI cable. I do not have an HDMI to VGA cable to try the VGA input.
2) I have tried swapping the two screen connections but the fault remains with the HP screen.
3) The power on status box shows the DVI input as active and the notebook still thinks the screen is active and sends display information to it.
4) If power cycled, the screen will display a half bright image for a couple of seconds then go black.
5) The OCD menu will not display, except if the button is pressed during the brief period when the half bright picture is displayed.
6) The fault is still present when the screen has been off for sufficient time for it to cool down (over 12 hours).
I know the screen is old and I am sure that HP would like me to buy a replacement but it is wall mounted and since installed I have developed mobility problems which mean that I cannot do the job myself. If there is no alternative, I will replace it but I want to explore all other options first.
Any help would be appreciated as trying to use the small notebook screen is giving me eyestrain.
Many thanks in anticipation.
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