Computer cannot find Mouse, Keyboard, Monitors.

Ignominius

Commendable
Dec 8, 2016
2
0
1,510
I was on my computer tonight when it stopped working. I am trying to figure out why, and if I can fix it.

I was typing out an essay and listening to some music when all of a sudden my computer powered off. I hadn't lost power, and my surge protector was still on, so I powered my computer back on, and it failed to start. After the fans spun for a few seconds it went back off. After waiting a short while I tried powering it on again and all of my lights and fans were working, however my monitors were not detecting the PC, and my keyboard and mouse were not lighting up. The monitors are connected by HDMI and DVI to the GPU, and the mouse and keyboard are connected via USB to the Motherboard.

I have tried plugging the mouse and keyboard into the case, and that did not work, however I did borrow a friend's laptop to make sure that they were still working and had not both magically broken instantaneously, and I have taken everything apart and airbrushed it and plugged the power cables back on to the CPU and the Motherboard to make sure it's not the PSU not being able to keep everything on at once, but now that I have done that my power and reset buttons do not want to work. I do not think it is the motherboard but I have no way of knowing. Because I cannot use the mouse or keyboard or a scene I cannot access the BIOS, and I have tried replacing the CPU and the GPU but these do not appear to be the problems. I do not think that it overheated, I have 9 fans including the 1 for the PSU, 2 for the GPU, and 1 for the CPU. The room temperature is 23°C, I have never had any issues with throttling due to high temperatures, and I wasn't using the computer for anything high-maintainence. I have no way of verifying if there is a problem with the motherboard since I cannot check the BIOS or get anything to connect via USB to the motherboard other than my microphone, which still lights up.

If any of you know what could have caused this/is causing this I would really appreciate your help with getting my computer back up and running.

Thanks!



OS and Specs:

OS: Windows 8.1
PSU: Corsair RM650i
CPU: AMD FX-8350
GPU: MSI GTX 1070
MBB: Gigabyte GA-78LMT (DDR3 & AM3+)
Memory: 2x 8GB Adata ADT-1600A

Most of the components are quite new, except for the Motherboard and the memory sticks, which I had cannibalized from my old computer.
 
Solution
Could have been some random fluke or sequence of events; i.e., "Gremlins".

Computers are an amazining collection of hardware, software, firmware, configurations, and user "oops" sort of things. Lots can go wrong.

Most IT folks probably know a few people (co-workers, friends, family members) who cannot touch a computer without some crash or error happening.....

More practically, if the crash happens again check the Event Viewer logs to see if there was some error or warning code entry. Take a look at the logs beforehand to familarize yourself with them and get a sense of the often extensive amount of information available. Do not get too concerned if you find some red and yellow icons - every computer will have a few of those...

Ralston18

Titan
Moderator
I would consider the PSU as the most likely culprit. Even new components can fail and PSU related problems can cause all sorts of system trouble.

Check Cosair's website to see if there are any related/similar FAQs or postings in their forums. Or just google "Cosair RM650i" and see what can be found.
 

Ignominius

Commendable
Dec 8, 2016
2
0
1,510


Thank you for the feedback!

Corsair recommended I run a paper clip test on the PSU to ensure it was still in order and that was a success, however this still means I do not know the culprit for my computer's sudden shutdown. Curious to know where you or anyone else thinks I should proceed from here.

Thank you for your patience,
Ig
 

Ralston18

Titan
Moderator
Could have been some random fluke or sequence of events; i.e., "Gremlins".

Computers are an amazining collection of hardware, software, firmware, configurations, and user "oops" sort of things. Lots can go wrong.

Most IT folks probably know a few people (co-workers, friends, family members) who cannot touch a computer without some crash or error happening.....

More practically, if the crash happens again check the Event Viewer logs to see if there was some error or warning code entry. Take a look at the logs beforehand to familarize yourself with them and get a sense of the often extensive amount of information available. Do not get too concerned if you find some red and yellow icons - every computer will have a few of those just as a matter of routine.

Next crash - check the logs.

FYI/Oped: in fact many of the computer scam telephone calls will use the presence of those Event log icons to trick the victim into thinking that their computer is going to destroy all data and end the world unless the victim does something; e.g., 1) grant the caller computer access right now to fix the problem, 2) send $ in some manner to the caller, or 3) all of the above. Do not fall for such scams - Microsoft (or the IRS for that matter) is not going to call you. Help spread the word about that. Senior citizens are especially vulnerable to those scams.
 
Solution