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Windows 7: Monitor doesn't work and USB devices aren't detected

13 Feb 2016   #1

Microsoft Windows 7 Professional 64-bit
Monitor doesn't work and USB devices aren't detected

Okay, so I'm helping a friend out in building his first computer but the problem we're facing now is that the monitor connected up to the computer (that's finally put together) doesn't show anything, and the USB devices (being the keyboard and mouse) connected don't work.
If there's anything you'd like to ask about the build, what's connected what's not, feel free to ask; I'll tell you what you want to know.

*Things I know for sure*
The mouse and keyboard aren't broken.
The monitor worked 2 days ago, so I highly doubt the monitor just stopped working all of a sudden?

My System SpecsSystem Spec
13 Feb 2016   #2

Microsoft Windows 7 Professional 64-bit

So... my friend managed to get it working by himself, but what bugs me is that the problem was with the RAM.
There are four ram slots; so RAM Slot 1, 2, 3 & 4.
1 & 2 are the first 2 rows of RAM that's closer to the CPU slot/cooler, and the cooler was already installed (Cumbersome)
So decided to use RAM slots 3 & 4 instead.
For some reason THIS was the problem; what had to be done at the end was RAM slots 1 & 4.
Slotting in the RAM with any other combination other than 1 & 4 didn't allow the computer to recognise the monitor or the USB devices for some reason.
Although the problem is solved now I would still like to know what went wrong, I want to learn from mistakes.
My System SpecsSystem Spec
13 Feb 2016   #3

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1

Which RAM slots to use if you only have two sticks and the motherboard has 4 slots available will be defined in the motherboard manual. Usually it is this first one nearest the CPU with the second one of the same clolor, might be 2,3 or 4. look in the manual.
My System SpecsSystem Spec

13 Feb 2016   #4
Layback Bear

Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64

I agree with mitchell65.
As far as I know the motherboards manual indicates the only proper way to install ram.

Some motherboards are different than others.
My System SpecsSystem Spec
13 Feb 2016   #5

Microsoft Windows 7 Professional 64-bit

That is so strange, I never knew there was a specific pattern in which the RAM was supposed to be installed.
I've always figured you could just use any slots in any order (although strange to be random with the RAM's placement for no good reason), and just to use which seems suitable be it 1 & 2 or 3 & 4 etc.
Anyways thanks I guess? haha
My System SpecsSystem Spec

 Monitor doesn't work and USB devices aren't detected

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