CPU working but no display?

tomadk1ns

tomadk1ns

tomadk1ns

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28 Mar 2013
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33
I've just received my componants and set the PC up. The motherboard seems to be working, as the CPU fan is working and it's picking up my USB mouse. But it's not picking up my USB keyboard. I've tried VGA from the mobo and hdmi from the graphics card. Nothing seems to be able to get a picture.. I've made sure the the right channel is on the monitor. Anyone have any ideas??

Specs are-:


Gigabyte ATi Radeon HD 7950 Windforce 3X 3072MB GDDR5 PCI-Express Graphics Card

Intel Core i5-3570K 3.40GHz (Ivybridge) Socket LGA1155 Processor (77W) - OEM

Gigabyte Z77X-D3H Intel Z77 (Socket 1155) DDR3 Motherboard

BeQuiet Pure Power L7 630W '80 Plus' Power Supply

Seagate Barracuda 7200RPM 1TB SATA 6Gb/s 64MB Cache - OEM (S (HD-257-SE)

Zalman Z9 Plus Tower Case with Fan Controller - Black

Kingston HyperX Genesis Grey 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (KHX1600C9D3X2K2/8GX)

Thermalright Macho 120 CPU Cooler (Socket 775 / 1155 / 1156 / 1366 / 2011 / AM2 / AM2+ / AM3 / FM1 / FM2)

OcUK 24x DVD±RW SATA ReWriter (Black) - OEM
 
Have you plugged both power connectors into the GFX card?

Is both the motherboards 24pin and extra 8pin ATX plugged in?

Did you remove the GFX card when you tried the motherboards display connection?

You may have to update the motherboards BIOS for it to work with the 7950.
 
Yeah.. The little blue ones that say pci-e?

Yeah tried gfx card by hdmi.. Then unplugged it from the mobo, and tried VGA coming from the mobo...both no picture :(

How would I do that without a display?

Cheers
 
Yeah, the GFX card needs two 6pin PCI-E plugs in it to run.

You have the extra 8pin ATX next to the CPU socket fitted yes?

If you have that done, then I would leave the GFX card removed, use a single stick of RAM (try in all the slots and then try the other stick of RAM)

You dont need the drives fitted to be able to boot up.

Try a clearCMOS.

Build the parts up outside of the case on a cardboard box.
 
they are normally 6+6pin is yours a boost edition or something? and it's the revision 1.1 of that motherboard that requires an 8pin ATX, the 1.0 is a 4pin ATX.

Try the last bits of the above post then.
 
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Weird, honestly thought they were 6+6pin.

But that doesn't explain why you are not getting a display direct from the motherboard/CPU IGP though. See how you get on with the suggestions.
 
Sooo strange.. I went and bought a motherboard speaker as one didn't come with it. When booting up it doesn't beep at all. Tried someone's else ram too, so it's def not the ram.. I'm almost certain it's the motherboard but parts of it are working.. Ie the motherboard speaker and power section bit, the CPU fan works and USB mouse.. But still can get display from VGA on motherboard.. Or hdmi on graphics card. I'm baffled, the motherboard is a B grade buy!?
 
Just to confirm when you have built it outside the case like Stulid said with 1 stick of RAM, the CPU, mobo and PSU only. It still doesnt work?
 
This may sound silly, have you tried after boot to press the Monitors on/off switch, that is OFF then ON to reset. (not the mains to power cord)
Not always the case but have seen this cure before.
 
Surely if its been shorted the PC would just turn off immediately after turning on. I personally don't see how an out of case boot would fix it. Try the CMOS clear button, if that doesn't work, take the battery out and put it back in 10mins after.
 
I purchased a hdmi to display port lead today (my monitor only has display port & dvi inputs) guess what it didn't work.

So what i'm trying to say is either use the mini display ports or the dvi output from the card as i think there might be an issue with the hdmi output on these cards

Hope this helps
 
Just try to get it to boot without the gfx card first, Clear cmos and hope that you didnt bend any pins when you installed the cpu.
 
tomadk1ns said:
I've just received my componants and set the PC up. The motherboard seems to be working, as the CPU fan is working and it's picking up my USB mouse. But it's not picking up my USB keyboard. I've tried VGA from the mobo and hdmi from the graphics card. Nothing seems to be able to get a picture.. I've made sure the the right channel is on the monitor. Anyone have any ideas??

Specs are-:


Gigabyte ATi Radeon HD 7950 Windforce 3X 3072MB GDDR5 PCI-Express Graphics Card

Intel Core i5-3570K 3.40GHz (Ivybridge) Socket LGA1155 Processor (77W) - OEM

Gigabyte Z77X-D3H Intel Z77 (Socket 1155) DDR3 Motherboard

BeQuiet Pure Power L7 630W '80 Plus' Power Supply

Seagate Barracuda 7200RPM 1TB SATA 6Gb/s 64MB Cache - OEM (S (HD-257-SE)

Zalman Z9 Plus Tower Case with Fan Controller - Black

Kingston HyperX Genesis Grey 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (KHX1600C9D3X2K2/8GX)

Thermalright Macho 120 CPU Cooler (Socket 775 / 1155 / 1156 / 1366 / 2011 / AM2 / AM2+ / AM3 / FM1 / FM2)

OcUK 24x DVD±RW SATA ReWriter (Black) - OEM
Click to expand...

When you say that the keyboard is not working I can only assume you are not seeing any of the lights turn on as normally happens when booting a computer?

This indicates to me that it is not POSTing at all, as said instead of messing around with it, take the motherboard, CPU, ram, graphics and power supply it of the case and rest it on a none conductive bench or as often on the motherboard box, make sure you take everything off, don't shortcut by leaving the CPU installed and the CPU heat sink on.

Now with the motherboard bare put the CPU in making sure it is correctly fitted and in the correct position, now instal heats ink making sure you ha e good contact all around (do not use too much heat transfer paste), now install just one stick of ram, plug in keyboard but don't bother with mouse at the moment, plug graphics card into the first pci express port, now with the power supply unplugged from the mains plug it all into the motherboard, plug into monitor, now power on the motherboard by bridging the pins that you would plug the case power switch into or if your not comfortable doing that see if you can use the case power button.

Now turn it on, is it working?
 
Hyburnate said:
Surely if its been shorted the PC would just turn off immediately after turning on. I personally don't see how an out of case boot would fix it. Try the CMOS clear button, if that doesn't work, take the battery out and put it back in 10mins after.
Click to expand...

Out of case boot is just good practice, it can be good to just start from scratch, I cannot tell you how many times stripping a newly built computer and then doing out of case partial and minimal build has fixed many issues.
 
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