Monitor Not Connecting to Newly Upgraded PC

[Eryche]

I've had this computer for a few years, and I recently upgraded its PSU, CPU, and motherboard. My current specs are:
Case: Default for HP Pavillion P7-1234
Motherboard: GIGABYTE GA-78LMT-USB3 AM3+
CPU: AMD FX-6300
PSU: Rosewill ARC-650
GPU: GIGABYTE Windforce GTX 660
HDD: 1 Tb (Default for HP Pavillion P7-1234)
Now, the problem is that when I plugged everything in and booted it, the monitor wouldn't respond to it and would not turn on with the computer, giving me a blank screen. I've tried using a different monitor, and I've tried taking out the GTX 660 and using the integrated graphics, but I still haven't had any luck. Please help me if you can, I'm not sure what else I can do.

 

[boju]

Go through this step by step guide and see if you've missed something: http://www.tomshardware.com/forum/274745-31-step-step-guide-building

 

[Eryche]

Go through this step by step guide and see if you've missed something: http://www.tomshardware.com/forum/274745-31-step-step-guide-building

I unplugged everything inside the computer and re-did and double-checked everything possible, but still the monitor will not respond.

 

[boju]

Do all the fans turn on, psu, cpu and graphics card?

You did remember to connect the 6pin pcie additional power at the back of the card?

Check the video cable and its making proper connections both ends, monitor and gpu. Sometimes the case can get in the way slightly.

 

[Eryche]

Do all the fans turn on, psu, cpu and graphics card?

You did remember to connect the 6pin pcie additional power at the back of the card?

Check the video cable and its making proper connections both ends, monitor and gpu. Sometimes the case can get in the way slightly.

Every fan is running, and yes I connected the 6pin onto the card. I also checked both the d-sub and dvi cables, and are both plugged in and secure.

 

[boju]

Can you link me to your graphics card please, just so i know exactly.

Image of an Asus 660 Ti card, this has two 6pin, yours might have two or just the one being the regular 660. They're all sets of 6pin not 4.

Unless you're using molex adapter

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182299

Down the page look at the connectors, the connector you will use for graphics cards is the middle 6+2 pin pcie connector.

+2 for cards requiring 8pin. GPUs can require different combinations from 1 6pin, 2 6pins, 1 6pin + 1 8pin or 2x 8pin.

Take a closer look at your card, if it requires just an 6pin you should be using a cable like this:

Same cable in the Newegg link just a closeup.

 

[boju]

If you meant the +12V EPS 4 + 4-Pin

This is for the cpu plug on the motherboard. Some motherboards take 4 or 8pin, they break apart to be compatible with either requirement.

 

[Eryche]

I apologize, I got the brand wrong. I mistook mine for an Asus, but it was a Gigabyte. http://www.newegg.com/Product/Product.aspx?Item=N82E16814125507 I was using a molex adaptor, but I took it off and now am using just the 6 pin on it. Still no change in my situation, though.

 

[boju]

Sounds like you're only using 1 pcie cable?

Just making sure this is your card: Watch for the rear of the card, it has 2x 6pin
[video="https://www.youtube.com/watch?v=Qv-N4gGousY"][/video]

also:

Must use both 6pin cables. 1 6pin probably be enough for the fans to spin but not to operate the card.

 

[Eryche]

Shoot, I apologize again. http://www.newegg.com/Product/Product.aspx?Item=N82E16814125443 is my correct card. I tried editing my last response to include this link, but I guess it didn't go through. My card has one 6pin slot in it, and I have it plugged in. Also, I have tried taking out my graphics card altogether and just using the integrated graphics, but that didn't work either.

 

[boju]

Integrated graphics wont work, even though the motherboard has video outs, the FX6300 doesn't have a graphics chip, only APUs do, so wont be getting video from them regardless.

Check you have the 8pin (2x 4pin) 12v cpu plugged in and also the 24pin ATX in tight, shouldn't be able to just pull it out.

What video cable are you using?

 

[boju]

Sorry i take back that statement, it does have integrated graphics on the motherboard as do some, i apologize.

 

[Eryche]

The CPU is plugged in and so is the 24 pin, but still no luck. Also, I'm using a DVI and VGA for my monitor-to-computer cables.

 

[boju]

Ok sure, this is puzzling but im not quitting yet.

The other monitor you've tested with, does it have hdmi? And would you know what DVI inputs they are on both monitors?

It's hard to know what a monitor has sometimes just by looking at the input plug, so maybe try the other GPU DVI if you haven't already and if it fits, DVI-I obviously wont fit in a DVI-D with the 4 extra pins. If your other monitor has HDMI, also give that a go, or even a TV with hdmi.

But still puzzling about how VGA is not working from the motherboard. This a simple suggestion i imagine and could come across as insulting but believe me i'm not putting it that way. Check your monitor is on the right source when you're trying this cable and that cable. I've been caught out before, a Samsung digital & analogue monitor i had didn't have auto switching so, i really thought something else was going on. But in saying that, even if monitor was set to either source, it would have shown a picture eventually changing from one input to the next.

 

[boju]

Also check your memory, maybe try one stick at a time. Possibly just a bad stick and again if that also fails, i'd have a close look at your cpu making sure no pins are bent.

Bread boarding the system would be the last step.

 

[Eryche]

Okay, so I've tested the monitor and it works with another computer. Kinda figured, but thought I should at least give it a go. So, it's gotta be something inside the computer that is the problem. I just got this cpu and installed it like, Saturday, so I doubt it has any bends in its pins, but I'll look. This honestly baffles me, because I've checked connections many, many times. I also took out one memory stick to see if one was bad, still no success. I'll have a look at the cpu again and get back to you. Also, what exactly is bread boarding? I've never heard that term before

 

[boju]

Bread boarding is taking everything out and assembling the motherboard and components onto a non conductive surface like a wooden chopping block to see if the case is interfering with the motherboard circuits or socket alignments. ie if not using enough standoffs to support the board or no standoffs at all (But this would short the board and nothing would turn on) and checking the case isn't restricting full connection between the gpu and pcie slot, could even be a screw wedged behind the motherboard in the silliest of spots.

 

[Eryche]

Okay, I understand that now. Also, I took out the cpu and there is nothing wrong with it. Should I try bread boarding it?

 

[boju]

Yes would be a good idea.

Do you have a motherboard speaker? Be a good idea to connect one and when theres something wrong it will give coded beeps you can search online, like 2 short beeps then 1 long beep etc

 

[Eryche]

I'm kind of against like, completely disassembling things that were in there to begin with like my disc drive and hdd, but I'm going to take out everything else and see if there's interference under the motherboard itself. Also, I do not have a motherboard speaker. I'll try to pick one up soon

 

[boju]

Psu, disk drive and hdds can stay in there, just the motherboard really to remove. Can manage to attach the psu having the case sideways and case power button cables etc.

System can post without disk/hdds so thats no drama leaving them.

Post meaning initial startup of the machine, getting a picture of the bios splash screen/abling to enter bios.

 

[Eryche]

Okay, bread boarding it didn't make a difference either. And there was nothing underneath the motherboard to cause interference either. Could the motherboard just be like, a dud? I mean, it's turning on and everything else, just the monitor isn't responding to it.

 

[boju]

Yea, its looking that way unfortunately since on board video isn't working either.

Can try clearing cmos resetting bios by removing the watch sized battery from the motherboard. It shouldn't be that, its more to do if incorrect bios settings were applied or overclocking went wrong. At least give that a go then look at replacing the board.

 

[boju]

The motherboard is resting on standoffs isn't it, elevated off the case chassis yea? All computers use some kind of standoff whether its separate or builtin on the motherboard, long as the underneath the board isn't touching.

 

[Eryche]

Yeah, I don't think it's touching the case. There are like, little nubs that the standoffs screw into so the board isn't touching it. But yeah, unless I managed to screw a motherboard into a case incorrectly, twice. Should I try loosening the screws or something? I just did it until they were tight, but I didn't tighten them super hard so I didn't break the case.