Samsung C27F398 Manual

Monitor won't turn on

If there's no indicator light displaying, check the power switch, check the power cord, and test the outlet. Unfortunately, this basic troubleshooting is the only way to try to fix the issue yourself. If this doesn't help the monitor turn on, then it will need service.

1. Check for a power switch.
   Some older monitors have a power switch on the back, similar to the power switch on the back of a desktop computer. This must be switched on before the power button on the front will work.
2. Test the outlet.
   Unplug the power cord for the monitor from the outlet and then plug something else in the same outlet (like a lamp) and make sure it's still working.
3. Plug the power cord back in.
   Remove the power cord from the monitor as well, and then plug it back in to both the outlet you tested and the monitor.
   It's pretty rare for power cords to go bad, but if you happen to have a spare one handy, you can try using a different power cord as well.

Monitor is flickering

A monitor that flickers, flashes, or blinks is never a good thing. Luckily, the most common cause for this is a connection issue or damaged cables. Follow this guide to determine if a new cable will fix the flickering, or if you need to examine the monitor's power source or refresh rate settings, or perform a system update.

1. Confirm the monitor's cable is connected securely and not damaged.
   Unplug the monitor's cable from the computer, inspect the pins for damage, and then reconnect it securely. Do the same at the other end of the cable where it plugs into the monitor. You can do this while your monitor is turned on, and see if the flickering stops.
   Note: If your cable is damaged, it will need to be replaced. You should also inspect the length of the cable, making sure that it is not pinched between anything, like the desk and the wall, or under a chair leg. Finally, if you happen to have another cable easily available, you can swap it in and check if the monitor still flickers.
2. Check the monitor's power source.
   Flickering can also be caused by an unstable or inconsistent power supply. Try the monitor in a different outlet, on its own circuit. If the flickering stops, there may be too many appliances plugged into the original circuit, or an inconsistent voltage from the outlet. Contact an electrician for further assistance.
   Note: Appliances such as heaters and other high current devices feed power back into the circuit and can make the monitor flicker. Keep these devices on a separate circuit from your monitor. A UPS (Uninterruptible Power Supply) is another option to provide a steady source of power to your monitor.
3. Set your refresh rate.
   The refresh rate is how many times a second your monitor displays an image. Higher values result in a smoother picture with less flickering noticed by the eye, however values which your monitor does not support can also cause flickering. In rare cases, you may feel more comfortable by reducing the value, instead.
   The most common refresh rate used for monitors is 60Hz and it is usually what most people feel comfortable viewing. Some monitors have higher values, such as 75Hz, 120Hz, or 144Hz. For the optimum experience, set this to the highest value your monitor and connected device will support. If this is uncomfortable, try other settings until you find one you like.
   The method for adjusting your refresh rate will depend on the operating system of your computer or connected device.
4. Perform all system updates.
   Check for any updates to your operating system, update the drivers on your video card, and check for any firmware updatesfor your monitor.
   If your monitor is still flickering, please visit our Support Centerto request service.
   For model LS27R750UENXZA or LS32R750UENXZA, you may not need service on the monitor but you may need to replace the supplied Y cable (part code BN39-02467A). Please contact usfor information on cable replacement.

Monitor display is blank

The most common reason for a monitor to be blank is that it's turned off, or it's hibernating or on a screen saver and will wake up with input. Assuming that's not the case, then troubleshooting involves identifying whether the issue is with the monitor or with the device it's connected to. Either way, there's some steps you can take to try to get it working again.

1. Disconnect and reconnect the video cable at both ends.
   A loose or defective cable can easily cause a blank screen, even if the cable appears plugged in or has previously been working fine.
   If the issue continues or if the cable is damaged, replace the cable. Also, make sure to use the best type of cable available: when both the external device and monitor support it, the best type of cable to use is an HDMI or Displayport cable, followed by a DVI cable, then a VGA cable.
   Note: Only use one video cable to connect your monitor to your device. If you use two, the monitor may be looking for a video signal on the wrong one.
2. Select the right source.
   Most monitors will automatically select the source that is sending a video signal, but sometimes the wrong one will be selected (especially if multiple devices are connected to the monitor) or you will need to manually select it. You can change the source with the buttons on the monitor or in the menu. See your user manual for instructions, if needed.
   Make sure the source matches the port on the back of the monitor that your external device is connected to.
3. Connect your blank monitor to a computer and access the computer's operating system.
   Note: If the monitor works when the computer is booting up, but is blank after the operating system loads, service is not required, and the issue is with your computer. You can try booting into Safe Mode to access the operating system. (On earlier versions of Windows, you can do this by pressing F8 repeatedly as the computer is booting. On a Mac, press and hold the Shift key until the Apple logo appears.)
   If the monitor is completely blank even when the computer is booting up, you'll need to connect a second, working monitor. Make sure it is set as your main monitor, and leave the blank monitor connected.
   If you are unable to successfully connect your blank monitor to a computer and access the operating system, skip to step 5.
4. Check drivers, settings, and firmware.
   1. Update the drivers on your computer. In particular, pay special attention to whatever is on the other end of the video cable from your monitor; if it is a graphics card, update that driver. If it is the motherboard, update that driver. If it is a USB hub device, update that driver, etc. The best way to update drivers is to visit the manufacturer's website.
   2. Adjust the resolution and refresh rate to the monitor's native settings. If they are currently set to something the monitor cannot display, it may result in a blank screen instead. Setting these back to the native settings will fix it.
   3. Check for a firmware update. Although most monitors never firmware update, if one is available for your model, it can be ourdownload center. In some cases, a firmware update is kn screen issue.
5. Connect a different device to the monitor.
   This determines if the issue is with the monitor or not. (Make sure to use a cable you know works.)
   • If the monitor works with any other device, then service is not required and the issue is with the original device. If a firmware update is available for your monitor on the download center, installing it may help increase compatibility with the original device.
   • If the monitor doesn't work with any device, visit ourSupport Centerto request service.
6. Check the monitor's menu for blurry text.
   Using the buttons on your monitor, open the settings menu.
   If the menu is blurry as well, visit our Support Centerto request service.
   Note: If this menu is clear and crisp and is not blurry, service is not required. See the following steps for possible solutions.
7. Check the resolution and refresh rate setting on the connected device.
   The picture will look best when the external device is set to output in the monitor's native resolution. If the device can also set the refresh rate, matching the monitor's native refresh rate will also improve performance.
8. Disconnect and securely reconnect the video cable.
   In some cases, a defective or loose cable might be causing the issue.
   If the issue continues, consider replacing the cable. When possible, try to use the best type of cable. When supported by both the monitor and the external device, the best cable to use is HDMI or Displayport, followed by DVI, followed by VGA.
9. Adjust the settings on your computer.
   If your monitor is connected to a computer, two settings can be adjusted to help correct blurry text:
   • DPI Scaling (On Windows, open the Start menu and search forMake text and other items larger or smaller. On a Mac, navigate to System Preferences > Displays > Display > Scaled.)
   • Text readability (On Windows, this is called ClearType. Open the Start menu and search forAdjust ClearType text. On a Mac, this is called LCD Font Smoothing. Navigate to System > Preferences > General.)
     These settings should be tweaked until you find the most desirable result. You may prefer to have the setting on or off.

Monitor is blurry

You want the text on your monitor to be clear and easy to read. If it's not, various settings can help clear it up better. There's a quick way to check whether the monitor is working correctly.