Go back to the top of this Monitor Forum* Open "FAQ Monitor"* Open "Monitor warranties and replacement instructions". Since the monitor buttons are unresponsive and there is no display, I cannot power the monitor off using the power button, I cannot access the OSD , I cannot run the Self-Test , and I cannot restore the monitor to factory settings . Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. The screen changes to Green* Press button 4. Thank you for the instructions. The screen changes to Blue* Press button 4. The screen changes to Red* Press button 4. The monitor powers up, the power light (white light) blinks, but the screen produces no display and the monitor buttons are unresponsive. Comments cannot contain these special characters: <>()\. To isolate if the power cord is working correctly, swap the power cords between the desktop and monitor. Since the monitor buttons are unresponsive and there is no display, I cannot power the monitor off using the power button, I cannot access the OSD, I cannot run the Self-Test, and I cannot restore the monitor to factory settings. The screen changes to White* The test is complete when the white screen appears. If you do not, the monitor is defective, If you do, proceed with the Built-in Diagnostics* Looking at the monitor buttons top to bottom, press and hold buttons 1 and 4 down for two seconds* An all Gray screen appears* Press button 4. Is the blinking power light an indication of anything? Every once in a while, the back light will light up for a second and then shut back off. S2440L - Blinking power light, no display, RE: S2440L - Blinking power light, no display. When I plug the monitor into a Windows-based laptop via HDMI, the laptop screen begins to flash on and off continually, but the Dell monitor never produces a display. Make sure the power cord is fully inserted at both ends. Test the power outlet being used by plugging in another electrical device and verify that there is power. If the power cord and the wall outlet are working correctly and the computer is not able to power on, proceed to the next step . This did not change anything; the buttons on the monitor are still unresponsive, the light on the power button is still blinking, and no display is produced. To exit, press the Button 4 again. Verify the exact location of the power indicator on the monitor. Please try again later. The manual only list three states for the power button LED:Off = OffWhite = OnAmber = On inactive (power save mode), * Get the monitor exchanged. Unfortunately, I am unable to turn the monitor off and on with the power button because the buttons on the monitor are unresponsive. The screen changes to Black* Press button 4. Please select whether the article was helpful or not. Figure 1: Locations of the power indicator and the power switch. These can be in different locations on different models. Every once in a while, the back light will light up for a second and then shut back off. The Dell monitor will show up in the Device Manager, and I can install the S2440L driver, but that didn't help. Sounds defective to me. The above occurs whether I have the monitor plugged into a computer or not. Or is it just an indication that no video source is connected to the monitor? The monitor powers up, the power light (white light) blinks, but the screen produces no display and the monitor buttons are unresponsive. I have tried this monitor on two different computers (a Dell laptop and a HP laptop) and the same symptoms occur on both computers. Monitor Has No Power and Power LED is Off If the monitor appears to have no power and there is no indication that the power LED is on, try these steps to see if any one of them will correct the issue: Press the power button and wait for three to five seconds. No idea about blinking. For example, does the blinking power light indicate a power supply issue or indicate that the monitor is in a power save or sleep mode? I did run through you instructions and disconnected the cables, held the power button for 15 seconds and then reconnected the power cable. * Turn the monitor off* Disconnect every cable from the monitor (including the power cord)* Press and hold in the monitor power button for 15 seconds* Reconnect the power cord to the monitor* Turn the monitor on* You should see the no cable message. Numbers reference image above: Models ST2321L, ST2330L, ST2220M, ST2220L, ST2420L, and ST2421L have the power indicator below the Dell logo in the center of the bottom part of the bezel surrounding the monitor (. Sorry, our feedback system is currently down. The only way I am able to turn the monitor off/on is to disconnect and reconnect the power adapter. Note: Dell desktops and monitors use similar type of power cords. Swap with a known-good power cord, if one is available. Central African Republic (République centrafricaine), Democratic Republic of the Congo (République démocratique du Congo), Dominican Republic (República Dominicana), French Overseas Territories (France d'outre-mer), Dell logo above the power light indicator. Press the power button and wait for three to five seconds.