Sometimes after my display goes into power saving mode, it will not turn back on through mouse or keyboard action, though normally it does. I experience this issue often but do not know how to reproduce it. Spins up, but no beep, no nothing. Cannot boot to desktop. Win 10 Pro (1903) New 10 Jun 2017 #6. Another thing I noticed is the power button suddenly turns off when I turn the PC on. Ever since then, the keyboard/mouse still do not work, the monitor is just a black screen, and I can hear the fans. My Computer dalchina. 5) Connect the AC power cord to the power supply, and then turn on your computer. The PSU turns on the GPU, CPU fan, case fans, and I feel the HDD's slight vibration. Again, I hard powered down and restarted. Posts : 28,019. This never happened before. The only way my PC should turn on is from clicking the power button, not my keyboard keys or mouse keys. This is not normal. Strange. Fix 5: Reset your BIOS settings to default. Since you mention no keyboard lights hook up another keyboard the monitor cable, computer power cable and try turning on the system again.. Do you see the bios screen now? Check the fix below. Connected everything. When I turn it on it powers up, fans are running, but screen remains black - goes to sleep or displays "check the signal" info, keyboard and mouse are not powered and HDD light on the front is off. The desktop PC is able to power on with the power light turned on; however, no image displays on the monitor. I have to press it a few times to get the blue light on. I accidentely click my mouse or keyboard and my PC turns on. PC boots up but no display and no keyboard or mouse light ... blinking constantly but the monitor wouldn't turn on. Improper BIOS settings can also cause your PC to boot into a black screen. I just started my PC after a while & it turns ON, lights turn on, but there is NO Display on Monitor. Turn on, nothing. If no … Check the power Please check the connection between the power cord, AC adapter, power extension cord, and the electric socket are well connected as shown below. power supply turns on computer lights, fan, dvd/cd drives... everything but monitor, mouse and keyboard. The computer has nothing on the monitor screen - it doesn't turn on. It's not normal. I unplugged the power for a day and turned it back on, and this time it was blue. keyboard, monitor and mouse do not turn on. Not sure if it has something to do with the Power Options > Hard disk setting, or if it's something else. Something about a file not right and I can only remember an 'hmode' or something like that. Please try the following steps for troubleshooting: 1. If your computer still can’t boot properly, don’t worry. So here is the setup: Asrock Z87E itx mobo Core i7 4790 12gb ram 600W Silverstone PSU GTX 1070 So I connect it all outside of the case since case is coming in still. 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