Computer turns on but no display or keyboard

COMPUTER TURNS ON BUT NO DISPLAY OR KEYBOARD UPDATE
COMPUTER TURNS ON BUT NO DISPLAY OR KEYBOARD PC

I have a warning speaker connected and it makes absolutely no beeping sound (unless it randomly boots into the system, then it makes a single beep sound).It can be frustrating when a PC doesnвЂ™t boot properly. I also tried to disable the sleep settings from power management, but I am not sure if that is causing it because the problem remains even if I shut it down. I have tried clearing the CMOS (through the button and manually reseating the battery). I tried swapping the rams, removing the rams and the GPU, but no luck. I even brought my new system to a different room just to make sure it's not the power outlet.ДЄlso, the orange qled light for Dram is constantly on in my recent attempts. The reason I posted the back story of my previous build was because of the unsettling fact that it had the same problem. My work relies on this PC, and despite being a PC owner for many years, I just can't figure out a solution. Please help me, this problem is killing me. And when it randomly turns on and boots, the usage goes above 130v at idle. And when my PC turns on (but doesn't boot, stays black) the usage is around 85-90v. I have got a UPS in place since I got my motherboard replaced, just to make sure that there's no harm to my PC from sudden outage. After some workaround (like unplugging/plugging the power cable) it turns on, but it's too random coz sometimes it works and sometimes it doesn't.ДЄnd that is the current state of it. Makes me think: could it be the GPU? I thought maybe the sleep is causing this, so I shut down to test, but even after that the computer wouldn't turn on. However, I did notice some glitch in the display during normal usage. After few tries, it turned on and booted fine. But then one day I tried to wake it up from sleep and the same problem. And it ran without any problems for sometime.

Obviously everything is under warranty so I gave the motherboard for RMA and I got the replacement with a new piece. There was a power outage in my area before this problem happened (I think even the first BSOD happened after that event) and after reading online and my own deductions, I thought maybe motherboard gave up. But in the next restart it again had the same problem and this time it would not restart whatsoever. I tried restarting a few time, unplugged the power cable from PSU and pressed the power button for 60 seconds to discharge the remaining power, and then it turned on fine. The computer would show led lights and fans running, but would not power the keyboard or mouse or show any display on the monitor. I was trying to figure out what was causing all this, when one day I just tried to wake up my PC from sleep and it turned on, but to my frustration, gave me the EXACT same problem as my previous/old computer. A couple of my USB ports actually stopped working. I started noticing that my computer kept making a sound it makes when you connect/disconnect something on the USB port, even though I wasn't doing anything of that sort. I was trying to see what activity was causing the BSOD, and for some time I was starting to think it was the external network adapter which was causing it, but even after removing it the problem persisted.

COMPUTER TURNS ON BUT NO DISPLAY OR KEYBOARD UPDATE

I rolled back windows update and I also tried restoring my PC to a previous date when it was working fine, but to no avail. I read about it and it said it meant a hardware issue, but I still thought maybe it was some conflict with any software. Sometimes the stop error would change, but most of the time it was the same as before. I thought maybe it's a one-off incident but the BSODs kept becoming frequent. The stop error read: 'Whea_uncorrectable_error'. Everything runned fine for the first few weeks, until I received a BSOD one day. And I decided I'd build a brand new gaming rig, which happens to be my current system. What was weird was that my PC would turn on randomly, but if I turned it off or it went back to sleep, it would go back to the same problem of not turning on (until it randomly would). I had tried everything, memtest, breadboarding, and couldn't figure out a solution. My mouse and keyboard also wouldn't receive any power, even though the fans and led in the case were all powering up. I had a PC that I built about 6-7 years ago which was running fine, until one day it would turn on, but won't display anything on the monitor. I am having a really weird problem with my PC and I just can't pin point the culprit.ДЇirstly, let me give you a background. I replaced my motherboard but that didn't solve the problem. Occasionally it turns on, but it's too random. There's no power to the keyboard and mouse. And the monitor works I can confirm that. My computer turns on but there's no display to the monitor.

Computer turns on but no display or keyboard