Pc boots, but sends no signal to keyboard, mouse or display.

Hello. As stated, I have already tried to enter into repair mode, by attempting a hard reboot. I do not get any visual feedback to my monitor whatsoever, and the pc is not sending any signals to anything connected to it, hence I cannot continue. The first issue at hand is that the pc is not outputting any image to the monitor. I also cannot attempt to enter BIOS, as the pc doesn't receive any inputs from the keyboard.

Hello sir, are you still here? So after switching to a fresh CMOS battery, and reinstalling windows on the computer, we managed to keep it running for a few days. It has been glitching a lot, and there seems to be some physical issue at hand, as the pc would sometimes drop connection to the monitors or completely freeze, usually happening when we put the headphones back down on the pc case itself. I don't quite understand why the pc refuses to send a signal to the monitor / keyboard until we remove and reinsert the cmos battery, but I think it's safe to assume that's not the actual problem here. What possible causes am i looking at, loose connectors? bad PSU? A faulty motherboard? I think we can exclude the graphics card being the issue since the pc doesn't just lose power to the monitors, but to the usb connected devices aswell.

If none of the methods I gave to get into WinRE or bootable media will show up on monitor, then it could be a monitor, cable, GPU or motherboard failure.

Have you tried another cable and another monitor?

You said the fans spin and it "stays on" without signal to monitor. Are there LED"s lit on the motherboard that might mean it's still good?

Do you have another video card to try?

Hi Leon. I'm Greg, 10 years awarded Windows MVP, specializing in Installation, Performance, Troubleshooting and Activation, here to help you.

You said there was a per cent progress on the Repair, did you notice what it said it was doing? This sounds a lot like a DIsk Check which checks the file system on the disk for possible bad sectors, and will get hung if the disk is failing. One of the manual repairs I will have you do is a Disk Check for the Command Prompt so you can observe this (if it will run) as it can mean the disk is failing and needs bootable disk diagnostics done to confirm this.

Because of this possibility if you have any files that aren't backed up I would rescue them now by skipping to Step 6 in the repair list below done from Repair Mode or bootable media.

Then Use whichever method works in this link to get into Repair Mode so you can do the necessary repairs or do a Reset: https://www.tenforums.com/tutorials/2294-advanc...

Easiest is to force shutdown by holding in the power button. Do this twice. The third time you power on it should start into Repair Mode. Once in the Repair Mode try the numbered steps below.

It may be necessary to create bootable media on another PC to access Advanced Startup Options to try repairs, a Reset or do the Clean install. The bootable media has it's own set of files so that repairs or Reset might work better, doesn't require a password, and you'll have it to if necessary do the vastly superior Clean Install.

To create Windows 10 Installation Media on another PC install Media Creation Tool and follow the directions here: http://windows.microsoft.com/en-US/windows-10/m.... Uncheck the box for Recommended Settings to choose the exact version and bit rate for the target PC only.

Insert media, boot it by powering up PC while pressing the BIOS Boot Menu Key given here: https://www.sysnative.com/forums/hardware-tutor...

If the media won't boot you may need to enter BIOS/UEFI Setup (pressing key given in chart in link above) to turn off Fast Boot or Fast Startup first.

Choose the boot device as a UEFI device if offered, on second screen choose Repair Your Computer, then Advanced Troubleshoot Options, then:

1. Try a System Restore,
2. If that fails try Uninstall Updates as far back as necessary to see if this was caused by an Update,
3. Open the Command Prompt to:

a) run System File Checker: https://www.wintips.org/how-to-run-sfc-offline-...

b) run a full Disk Check: https://www.windowsdigitals.com/how-to-run-chkd...

c) trigger Safe Mode with Networking (for internet) or Safe Mode following https://www.intowindows.com/boot-windows-10-in-... to roll back Updates & Drivers in Windows Update History, update your drivers from the PC/Motherboard manufacturer's website and diagnose further:

https://www.pcmag.com/news/354269/how-to-use-sa...

d) Enable the built-in hidden Admin to sign in to create a new Admin account to replace or repair yours:

https://www.tenforums.com/tutorials/2969-enable... (Option Five)

http://www.howtogeek.com/226540/how-to-create-a...

You can also try to repair the old account from the new one by running a Repair Install: https://www.tomshardware.com/how-to/fix-windows...

d) From the Command Prompt try to create a new Local Admin Account to replace your account: https://www.isumsoft.com/windows-10/3-ways-to-c..., sign in to test it, move files over, when ready delete the old account and if desired change the new one to your MS Account.

4. If those fail then go back to Troubleshoot Options to do a Reset.
5. If that fails choose Install Now, then Custom Install, then at the drive selection screen delete all partitions down to Unallocated Space to get it cleanest, click Next to let it create needed partitions and start install - this makes it foolproof. Everything needed to get the best possible Clean Install is here: http://answers.microsoft.com/en-us/windows/wiki.... It is a better install than any amount of money can buy and a great learning experience that will make you the master of your PC because you will learn what works best and how to apply it with your own hands.
6. If you have files that aren't backed up you can use the same bootable media to try to rescue your files using these methods: http://answers.microsoft.com/en-us/windows/wiki...

Your files should be backed up at all times if you value them at all. In the Clean Install tutorial in Step 5 I give the best methods to back up.

I hope this helps. Feel free to ask back any questions and let us know how it goes. I will keep working with you until it's resolved.

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Hello once more. I opened up the pc and removed the CMOS battery, without it I am able to receive an image, and usb devices work once again. I can now enter bios settings. However, the bios is telling me it detects 2 storage drives, which is accurate, but it is also telling me none of them are bootable devices. Is this due to the battery not being connected? Or did I reset the harddrives as I was trying to hard reset the pc earlier when I was not seeing any image on the screen? Even if I were to obtain a new cmos battery right now I'm not certain that would suffice in making the pc functional again, what do I do about not having any bootable drives?