Monitor displays no signal with gpu and on board graphics

[minecraftfreak091]

I got a new gpu (gtx 1080) to replace my old 970, and due to space limitations because of cables I ended up having to practically rebuild my pc instead of just swapping out the cards, but the issue I'm facing is when I power on the PC, all the fans start spinning but my monitor doesn't display a picture. I have tried multiple wires, monitors etc. I have tried removing the gpu and plugging a hdmi into my mobo but the issue persists. I have also tried putting my 970 back in, but again I get no signal on my monitor. This really sucks because I was hoping it would be a simple swap but instead it's been 3 long days of no pc and a lot of frustration. Any help is appreciated, thanks.

 

[hang-the-9]

So you did a lot of work on the system to get the card in, first guess is that something is not plugged in properly or possibly was damaged. If it's not even starting with no card, that is the only possible thing. Go over the setup again, make sure CPU is in well, RAM, all PSU cords, case connections to motherboard, etc... Have a second person look it over if you can't find anything.

 

[minecraftfreak091]

I didnt remove the ram or cpu, they're the only things I kept in the board. There is only 1 thing I can think of which is the power cables for my cpu have 8 holes, one with a square shape in opposite corners and rounded off house like shapes in the others, but on the other part of the cable they are all rounded off. My motherboard has 8 slots with the same shape first mentioned (rounded off shape and square) meaning I can only connect 1 of the cables. I don't see how this could be the issue though since the PC ran fine prior to this and I assume I only had one connected, but I don't remember.

 

[hang-the-9]

I didnt remove the ram or cpu, they're the only things I kept in the board. There is only 1 thing I can think of which is the power cables for my cpu have 8 holes, one with a square shape in opposite corners and rounded off house like shapes in the others, but on the other part of the cable they are all rounded off. My motherboard has 8 slots with the same shape first mentioned (rounded off shape and square) meaning I can only connect 1 of the cables. I don't see how this could be the issue though since the PC ran fine prior to this and I assume I only had one connected, but I don't remember.

Make sure you don't mix up the video card connectors for the PSU power cables. They should be keyed differently as far as the connector shapes (rounded/square). As I said, go through the system and check over the wiring and have someone else look it over.

 

[henryjamesguest]

If I was you, I would also check the 24-pin motherboard connector. They occasionally don't seat properly, and could cause that issue, Does your motherboard have indicator lights, and if so do they light up, if so that it isn't the 24-pin. As mentioned above, check all your cable inputs to your motherboard. If you use a cpu with integrated graphics, try plugging into the motherboard display out to assess if it's a GPU issue (not powering etc.).

 

[minecraftfreak091]

There are some lights on the motherboard that light up, so I guess that rules out the 24 pin connector. My uncle is going to help me out over the coming days. As far as I can see, everything is in the right place. I guess I'll just have to wait for a new pair of eyes to check it out instead.

 

[henryjamesguest]

Did you try the motherboard display output? If it too gives no signal you rule out the GPU so I suggest doing that first. If it gives a signal output, then remove and reinsert your gpu again, and ensure your power connector in seated properly.

Do you have a modular PSU? If you do, make sure all the connections into it are in properly, as you may have slightly pulled one loose during dis/re assembly.

 

[minecraftfreak091]

Did you try the motherboard display output? If it too gives no signal you rule out the GPU so I suggest doing that first. If it gives a signal output, then remove and reinsert your gpu again, and ensure your power connector in seated properly.


Do you have a modular PSU? If you do, make sure all the connections into it are in properly, as you may have slightly pulled one loose during dis/re assembly.

I have a non modular psu, and I have tried the output from my motherboard (without the gpu in my pc) and it was still no signal. Would this be likely to be a motherboard issue or something else? I'm hoping it doesn't set me back a lot because I literally spent all the money I have and more on my 1080, it would suck if I couldn't use it.

 

[henryjamesguest]

What CPU do you use, does it have integrated graphics?
Just to completely rule out the gpu, remove it from the system and boot from only the mobo display output. If you get an output then, it's the gpu, if you don't, it's not. (Only if you have integrated graphics)

 

[minecraftfreak091]

What CPU do you use, does it have integrated graphics?
Just to completely rule out the gpu, remove it from the system and boot from only the mobo display output. If you get an output then, it's the gpu, if you don't, it's not. (Only if you have integrated graphics)

I have an i7 6700k, honestly not sure if it has integrated graphics but if it does then it isn't working. I've tried getting an output from the motherboard but no luck.

 

[henryjamesguest]

i7 6700K does. Good news, it isn't your GPU. I assume you checked the 8-pin CPU power as posted above. I know you didn't touch the RAM, but try moving them over one slot just in case. You can reinsert the GPU now.

 

[minecraftfreak091]

i7 6700K does. Good news, it isn't your GPU. I assume you checked the 8-pin CPU power as posted above. I know you didn't touch the RAM, but try moving them over one slot just in case. You can reinsert the GPU now.

The CPU power cables are clearly marked but only 1 of the 4 pin connectors will fit into my motherboard, as the other one doesn't have the right pattern. Am I meant to put it in anyway? I refrained from doing this so far as I didn't want to damage anything.

 

[henryjamesguest]

If it doesn't have the right pattern don't connect it. Was it working fine before with the current set up?

 

[minecraftfreak091]

If it doesn't have the right pattern don't connect it. Was it working fine before with the current set up?

I don't remember if I had just the 4 plugged in last time, but until I rebuilt it to get the gpu in, all other parts worked completely fine.

 

[henryjamesguest]

Look at the top-left and bottom-right shape on each of the connectors from your PSU and compare them to the ones on your motherboard. If they match, try to plug them in, bearing in mind a moderate amount of force may be needed. Also make sure you have the clip the right way up (match with the ridge on the motherboard connector).

 

[minecraftfreak091]

Look at the top-left and bottom-right shape on each of the connectors from your PSU and compare them to the ones on your motherboard. If they match, try to plug them in, bearing in mind a moderate amount of force may be needed. Also make sure you have the clip the right way up (match with the ridge on the motherboard connector).

Only 1 will match. The board has 2 of the alternate shapes but one of the connectors from my psu is all rounded house like shapes with no squares. Only 1 connector is able to fit

 

[henryjamesguest]

What model is your motherboard and power supply please.

 

[minecraftfreak091]

What model is your motherboard and power supply please.

Mobo is a z170a and psu is an evga 500B

 

[henryjamesguest]

SOrry, I need more detail than that for your motherboard. Who's the manufacturer and what's the part number etc.

 

[minecraftfreak091]

SOrry, I need more detail than that for your motherboard. Who's the manufacturer and what's the part number etc.

https://www.asus.com/uk/Motherboards/Z170-A/ here's a link to the board

 

[henryjamesguest]

It should be an 8-pin connector and look like this in the format of two 4-pins http://www.tomshardware.com/answers/id-3325251/pin-psu-pin-cpu-connector.html

 

[minecraftfreak091]

It should be an 8-pin connector and look like this in the format of two 4-pins http://www.tomshardware.com/answers/id-3325251/pin-psu-pin-cpu-connector.html

That's exactly what it looks like, but I can only connect 4 of the 8 pins. Does this mean that my cpu also isn't an issue?

 

[henryjamesguest]

Yeah. So you have two sets of four pins?

 

[minecraftfreak091]

Yeah. So you have two sets of four pins?

Correct. 2 sets of 4, but one of the sets of 4 doesn't match up to the mobo so I have left it unplugged.

 

[henryjamesguest]

Right. Clip the two together by sliding them next to each other. Once they are clipped together, you can just insert them.