tft lcd monitor troubleshooting factory

There’re more than 300 procedures to produce TFT LCD. The most advanced LCD, in which the array and cell process are highly automatic. Technically, every step in the process can lead to defects, and most of the defects have been eliminated through the development of TFT LCD technology.

For the first two situations, that’s because the circuit on the TFT and CF controlling that defective pixel point is shorted or broken. While the third situation is caused by damaged color pixel.

In LCD, newton’s rings may occur on screen when two glass substrate haven’t been sealed well, so that one of the glass may form a convex lens and lead to light interference.

Article summary: This article provides information on how to use & troubleshoot your Dell S2318M monitor, key features of Dell S2318M monitor, technical specifications, how to setup your Dell S2318M monitor, how to find the documentation or manuals for Dell S2318M monitor, how to reset the monitor to factory default settings and troubleshooting steps to resolve common issues on Dell S2318M monitor.

The Dell S2318M flat panel display has an active matrix, Thin-Film Transistor (TFT), Liquid Crystal Display (LCD), In-plane Switching panel and LED backlight. The monitor features include:

This section provides some specifications of the Dell S2318M monitor. For more information about the Dell S2318M monitor, refer to the User Guide at the Dell Manuals website. Back to Top

Connecting the Monitor - Refer to the knowledge base article How to Connect a Monitor to a Computer?. Alternatively, you can also refer to the Setting Up The Monitor in the User"s Guide for your Dell S2318M Monitor.

Ports & Connectors - Refer to the User"s Guide for your Dell S2318M Monitor for more information on the Ports & Connectors available on your Dell S2318M Monitor. Back to Top

Use the buttons at the bottom of the monitor to access the On-Screen Display (OSD) menu of the monitor. To access the On-Screen Display (OSD) menu, press Button 3 at the bottom of the monitor.

For more information on Using the On-Screen Display (OSD) Menu, refer to the Operating Your Monitor section in the User"s Guide for Dell S2318M monitor.

During the LCD Monitor manufacturing process, it is not uncommon for one or more pixels to become fixed in an unchanging state which are hard to see and do not affect the display quality or usability. For more information, refer to the Dell knowledge-base article Dell LCD Monitor Pixel Guidelines. Back to Top

Your Dell S2318M Monitor provides a self-test feature check that allows you to check whether the monitor is functioning properly. If the monitor and computer are properly connected but the monitor screen remains dark, run the monitor self-test by performing the following steps:

If your monitor screen remains blank after you use the previous procedure, check your video card (GPU) and computer, because your monitor is functioning properly. Back to Top

Your Dell S2318M monitor has a built-in diagnostic tool that helps to determine if the screen abnormality you are experiencing is a problem with the monitor or with the video card on your computer.

When you notice screen abnormalities like distortion, clarity, horizontal or vertical lines, color fade etc., it is always a good practise to isolate the monitor by running the Built-In Diagnostics.

If you notice any abnormalities during Built-In Diagnostics, you may get the monitor repaired/replaced if it is under warranty by contacting Dell Technical Support.

This section provides information on troubleshooting steps that can help resolve the most common issues with the Dell S2318M monitor. Click to expand the section to find more information.

A few permanently bright or dark pixels are considered normal by industry standards. The exact number of pixels allowed varies depending on the monitor. Refer to Monitor Quality and Pixel Policy for more details.

Built-In Self Test - The Dell S2318M monitor has a built-in self test that helps you identify if the screen abnormality is with the monitor or the video card (GPU) on your computer. When you notice screen abnormalities like distortion, clarity, horizontal or vertical lines, color fade etc., it is always a good practise to isolate the monitor by running the Built-In Diagnostics.

The Troubleshooting section of this Dell knowledge-base article provides information on troubleshooting common issues with the Dell S2318M monitor. The section has troubleshooting steps on how to resolve power issues, video issues, color or clarity issues, distortion issues, horizontal or vertical lines, brightness issues or pixel issues etc,.

To navigate the On-Screen Display (OSD) menu, use the buttons on the monitor. The monitor control buttons are usually on the right side , either on the side, front or bottom of the monitor. To access the On-Screen Display (OSD) menu, press Button 3 on the monitor.

For more information on using the On-Screen Display (OSD) menu and different menu options, refer to the Operating Your Monitor section of the User Guide of the Dell S2318M monitor.

A few permanently bright or dark pixels are considered normal by industry standards. The exact number of pixels that are allowed varies depending on the monitor. See the Dell Monitor Quality and Pixel Policy for more details.

When the monitor is connected to a personal computer using HDMI and PBP mode is turned off, the monitor may display images at the lower resolution (2560 x 1440) rather than automatically switching to the native resolution (2560 x 1440).

When the monitor is turned-off and back on, the monitor may blink twice. This issue may occur if the personal computer is using a Nvidia Graphic NVS 310 card and graphics card resolution setting is 2560 x 1600.

If the monitor is powered-off and powered-on when displaying the Blu-Ray video, the Blu-ray player may lose the data signal from the computer to the monitor.

To learn more about how to set up and configure the Dell P2423DE monitor with a Dell docking station. See the System Requirements and Supported Configuration in the support site.

This is normal behavior of the monitor. Dell consumer monitors are inspected at 150-lux ambient lighting (similar to typical office lighting). Dell UltraSharp and Gaming monitors are inspected with a tighter criteria of 70-lux ambient lighting (dimly lit room but not dark). See the Dell knowledge-base article Troubleshooting Light Leakage or Light Bleeding on a Dell Monitor or Laptop LCD Screen.

Dell P2423DE monitor uses a curved IPS panel, the corners of the screen may appear slight yellowish or pinkish, especially when viewing in dark room. This is normal IPS panel behavior and typically does not affect the overall viewing performance.

Dell P2423DE monitor is factory default set at HDMI EDID with three Block (Detailed Timing Descriptor) to support 2560 x 1440 @ 60 Hz. To display a resolution of 3840 x 1080 @ 60 Hz or lower, you need to switch the monitor HDMI EDID from three Block to two Block.

I need to reset my monitor’s settings back to default factory settingsTo reset your monitor’s settings back to its default factory settings, follow these instructions:

My monitor is not turning on even though it is plugged in (external power supply)First, try another device in the same outlet to determine if the outlet is working properly.

Amber Light: The amber light indicates the monitor is receiving power but is not receiving the video signal being fed from the signal source (camera, computer, etc). This may also signify that the monitor is currently set to the wrong video input; you may need to press the “Auto/Switch” button to select the appropriate input (VGA, HDMI, etc).

Green Light: If the power is on, the connections are secure, the video signal source is on, and the light is still GREEN, then this dictates a problem internally with the monitor; it needs to be returned for repair.

My monitor is not turning on even though it is plugged in (internal power supply)First, try another device in the same outlet to determine if the outlet is working properly.

Amber Light: The amber light indicates the monitor is receiving power but is not receiving the video signal being fed from the signal source (camera, computer, etc). This may also signify that the monitor is currently set to the wrong video input; you may need to press the “Auto/Switch” button to select the appropriate input (VGA, HDMI, etc).

Green Light: If the power is on, the connections are secure, the video signal source is on, and the light is still GREEN, then this dictates a problem internally with the monitor; it needs to be returned for repair.

My monitor screen is completely black, even though it is powered onIs everything firmly plugged in? A loss of video signal will cause the monitor to go black and then turn off entirely. It is easy for cables to become loose and not firmly connected, especially if you are using a mobile system. Please check to make sure everything is securely plugged in.

Your monitor possibly has TRU-Vu’s Dim-To-Black feature which allows you to control the screen’s brightness and contrast by pressing the arrow keys in the menu. The reason it has gone completely black could be because the dim-to-black was turned all the way down. Press the arrow up to the right to raise the brightness again. If this does nothing, try pressing the left arrow keys.

Why does my monitor keep entering sleep mode when I turn it on?The primary cause is usually that the monitor is not receiving a video signal from the signal source (camera, computer, etc). The monitor will automatically enter sleep mode if it cannot detect a video signal.

Example: If you have the computer plugged into a monitor and the computer is off, when you power the monitor on, it will turn on for a few seconds, then automatically switch into sleep mode and turn off. Once you turn the computer on, the monitor will automatically recognize the signal source and power on.

The monitor will automatically switch into sleep mode if your video signal source (camera, computer, etc) is off or disconnected. Make sure your source is on and firmly connected.

If the LED on the monitor is amber, this means the monitor is receiving power but not receiving a video signal from your source. Ensure the monitor is set to the correct input and try swapping out sources to determine if that is the root of the problem.

If possible, try using a different monitor with the same cables and source. If the new monitor works, then there is an issue with the original monitor. Contact us for a repair RMA.

Why are there black bars and/or squeezing (banding) with my monitor?If there are black bars around your signal and/or a “squeezing” effect, this means that the aspect ratio of your monitor and the incoming video signal do not match.

Make sure the monitor’s picture size setting is set to the factory default, not zoom, fit or stretch. For optimal picture quality without distortion, black bars or squeezing, it is always best to match the aspect ratio of your video signal with the aspect ratio of the monitor.

How do I know if my monitor is really showing true 4K video?Make sure that that the signal you are sending is 4K resolution (3840x2160). You can test this by pressing the monitor’s Menu button. The monitor’s Menu screen will display the incoming video resolution and timing in the top-right corner of the screen.

The buttons on my monitor are lockedKeylock is a safety feature offered by TRU-Vu to prevent unauthorized personnel from changing the desired monitor settings. We do not publish the lock codes for public knowledge; please contact us for the unlock codes.

I increased the Brightness setting on my Sunlight Readable monitor, and now the image is washed outIf you would like to achieve a brighter image than the default settings on a TRU-Vu SRM-Series Sunlight Readable monitor, we recommend keeping the Brightness setting at the default setting (you may need to perform a factory reset/recall if you’ve already adjusted the Brightness), and then increase the contrast.

The speakers are not very loud on my monitorTRU-Vu speakers are provided for signals and alerts; these are not intended for voice or music. If quality of sound is a major concern, we advise using external speakers.

My monitor is displaying a message saying “Sync Out of Range”If you are seeing this on your monitor, it means you are sending a video resolution to your monitor that is higher than your monitor’s native resolution.

Please review the TRU-Vu data sheet to determine your monitor’s video resolution and set your incoming video source to the same resolution as listed on the monitor data sheet.

It is always recommended to spray the microfiber cloth first, then clean the screen with the moistened cloth. Do NOT spray the monitor screen directly.

I need to clean my monitor screen (with protective glass)We highly recommend WHOOSH Screen Cleaner. It is 100% natural, non-toxic, and environmentally friendly. You can also use any standard glass cleaner.

The first step to address an Acer computer monitor not turning on is to check all the connections and power to the monitor and PC. Check the power strip you are using by plugging the acer monitor power cord directly into the wall. Make sure the outlet you are using is not powered by a switch.

Reset the power to the monitor by removing all power from it. Then press and hold the power button for 30 seconds. Connect the monitor to a power source and turn it on.

Some monitors may have an internal battery. If so there will be a battery pinhole near the power port. While the monitor is unplugged, you can reset this battery.

If the power is working for other devices, but the Acer monitor is still not functioning correctly, it can signal that there could be an issue with the power cable. If this is the case, the power cord is easily replaceable.

Depending on the Asus monitor model you are using, if you press the OSD button and see a menu that displays, you can reset the monitor settings. Do this by pressing and holding the ‘menu’ key.

Missing or outdated drivers can give your monitor issues as well. If you have an integrated graphics output, you can plug into that output and update your video card’s drivers.

If it’s not turning on at all (no lights, no response) then it could be a faulty power cable or a problem with the actual monitor. Acer’s customer support may be able to help: https://www.acer.com/ac/en/US/content/service-contact

I have an acer 32 inch curved 16hz, and I’m having to unplug my pc and monitor and plug back in in order for my monitor not to display no signal and go to sleep. Why is this happening? Everything is brand new pc as well

My Acer LCD monitor nitro ed0 series- ED270 is not displaying a screen at all, it is just black, I think I might have switched the inputs or messed with the settings on the monitor. What should I do?