After power outage PC turns on, but there is 'no signal' on the monitor. After a power blackout, I powered up my PC. Question Computer turns on but no signal on monitor: Systems: 1: Jun 5, 2020: R: Question PC turns on and off in a loop , no signal on monitor: Systems: 4: May 22, 2020: S: Question New system powers up, no signal to monitor, then turns off after less than a minute? When you disconnect the cable, instead of an on-screen message, the light turns amber, indicating that the monitor lost signal and is working properly, but is out of range, or not receiving the signal. I have tried all 3 connectors, but my monitor is not receiving any signal no matter what video port I connect to. More often than not, with this issue “computer turns on but no signal to monitor”, cable is the culprit. If the computer is turned off, it cannot transmit a signal and causes the "no input signal" message. Then it just goes to sleep. You didn't say if you tried your monitor on a different known working PC to check if it worked OK, a different known working monitor or a new monitor cable or even a different video output signal type (if available) e.g. My motherboard is a P8Z77-V LX Page 1 of 2 - My Screen shows "No Signal" but my PC Starts up. All was well, but when I tried to turn it on today, there was no signal to the monitor. Replace the HDMI, VGA or DVI cable if you have on in spare and check again. Some monitors do not have on-screen messages but instead use the lights to indicate no signal. Assuming that your problem is also "Monitor no signal after start up" as per the thread. 3) Remove your graphics card from your motherboard and then insert it firmly in its slot. Verify the monitor cable is connected correctly and securely on the back of the monitor and the back of the computer. Computer not transmitting a signal. If you still get the no signal message on your screen, don’t worry! Hi one day i sat down and tried to turn my desktop on and the monitor said "no signal input". Okay. The computer is never been damaged or nothing its a great pc and had it for a few years till now its says no signal. My lap top and iPhone work fine. So i checked all the wires to make sure they were all pluged in and that there where no bent pins. See if this issue persists. Monitor not connected properly. Unplugging and plugging didn't work. I recently bought a ThinkCenter M93p SFF computer. PC turns on, No signal, keyboard/mouse. So Ive researched for the past few days and figured all my mistakes (using HDMI). When the PC restarted it came on perfectly fine but I am getting no signal on my monitor and my razer keyboard & mouse aren't coming on or lighting up. 4) Plug the power cable of your monitor back in and connect it to your PC.. 5) Hold the power button down for 30 seconds to a minute and then connect your power cord back and turn it on. The motherboard has 3 connections for a video signal, 1x VGA and 2x DisplayPort. It turned on but there was 'no signal' on the monitor. i turn my pc on and you can see its on because i can hear and see the CPU fan and the other fan spinning but i get on my monitor no signal, i have tried taking out ram cleaning it and then put in still don't work. Make sure the computer has power. In case the video cable for the monitor is detachable, try using a different video cable to test in case the cable is faulty. - posted in Internal Hardware: Hey! I …