why wont my pc show anything on the screen?

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John_477

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Sep 14, 2016
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so i was building my own pc and everything is hooked up, video card is mounted in a working pci slot, got a new cpu today and installed it, 6 gigs of RAM, the only thing that isnt new is my hard drive which is from my last computer, and a brand new mtherboard (well its refurbished) and it turns on but nothing shows up on the screen, not even the motherboards BIOS, someone know what might be the problem?

GPU- gtx 750 ti
CPU- intel pentium g3240
mobo- z97 gaming 5 intel motherboard (certified refurbished)
RAM- 2 GB's of ram X3

 
Solution
Aeacus
When you put your GPU into the PC, you have to connect the monitor to the GPU.
There won't be any display if your monitor is still connected to the MoBo since GPU automatically disables onboard graphics.
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John_477

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then i removed one ram card (leaving only one in) and it went past those into the 30's mostly 34
 
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Aeacus

Aeacus

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According to the MoBo manual, code b2 is: "Console Output/Input devices/Console initialization and Load Option ROM (VGA, RAID, parallel ports, serial ports……)".

And code 2b is a RAM error code.

30's and 34 is the CPU temperature the MoBo shows once it has successfully booted up.

As DSzymborski already stated, use only 1 or 2 sticks at once, never use 3 sticks at once.

What kind of display connector you use to connect your monitor to the PC?
 
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John_477

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Sep 14, 2016
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i am using a VGA that i have hooked up to the motherboard at the second while the video card is sitting out, i just reset the CMOS and now im getting a code for 49, there is only one RAM card in slot 4 that allows all the other error codes to pass, it takes like maybe 3 to 4 minutes to go from 43-49 going through all the numbers slowly, and im positive the VGA cable and monitor work
 
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Aeacus

Aeacus

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When MoBo goes through all debug codes and stays in the 43-49 range then that is the CPU temperature.

To get the display working, there are few more things to do.

It's easier for you if you breadboard your MoBo (take it out of the case and sit it ontop of any cardboard box).

1st, remove any extra components connected to the MoBo, except CPU and CPU cooler. That includes: all storage devices (SSD, HDD), optical drives (DVD reader/writer), GPU, case fans etc.

Connect only the main 24-pin power cable, 8-pin CPU power cable, insert one RAM stick and connect monitor to the VGA port. Also connect the keyboard and mouse. If you have onboard speaker, connect that too.
You can connect the front I/O panel connectors if you don't like to jumpstart the MoBo to start your system (by connecting shortly the Power + and - pins with screwdriver). Without front I/O panel connectors, you can shut down your system by flipping the power switch the PSU has.

Boot up your system and look if you get any display. Do note that without any storage devices, on boot, the PC enters into BIOS.
Also look the debug LED and look on what code it stays on after a while.
 
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John_477

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nothing happened, my monitor still has the screen test on,
 
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Aeacus

Aeacus

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When you installed your CPU, did you make sure that there weren't any bent CPU pins on the MoBo LGA1150 CPU socket?

You can also test each RAM in every slot, just to make sure it isn't a RAM issue (bad RAM can cause no display).
Take RAM stick #1 and put in into 1st slot, boot up and if there's no display power down and move the same stick to the 2nd slot. Repeat the process with all 4 RAM slots. After that, move on to a RAM stick #2 and repeat the same process. And lastly, do the same with RAM stick #3. In total, there would be 12 boot ups since you have 3 RAM sticks and 4 RAM slots. It's tedious thing to do but this is how the hardware troubleshooting is done.

It would help if you have a spare monitor that uses any other connector than the VGA. It's a longshot but perhaps your MoBo doesn't output the analog signal used in VGA monitors. Just connect the spare monitor to the MoBo's DVI-D port and look if you get any display.
Note: you can't connect VGA monitor to a DVI-D port using a VGA to DVI-I adapter since DVI-D port doesn't have analog signal in it and VGA monitor doesn't work in there.
 
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John_477

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it seems as if i have a bent pin and i cant seem to get up under it to fix it, what ca i do?
 
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Aeacus

Aeacus

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I don't suggest you to try and fix it yourself, especially when you don't have much experience in hardware.
Your best bet would be to bring it to any local PC hardware repair shop and let the expert fix it for you.
If that isn't an option, return the MoBo to the seller and ask for a repair or a new MoBo. Since it's certified refurbished, it should have the same warranty as brand new parts have.
 
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John_477

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so actually i can see the mobo's bios now and the overclocking setting and all when bread boxing mymobo but when i plug the vga to the GPU inothing happens again, what can i do? (again this is a brand new GPU)
 
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Aeacus

Aeacus

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You can try different PCI-E x16 slot for your GPU. You have 3 slots to choose from.

When i built my Skylake build, first i installed the Win and MoBo drivers while making sure that my system works fine with onboard graphics. And after that, i inserted my GPU into the MoBo and installed it's drivers aswell.
 
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John_477

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Sep 14, 2016
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everything works when i plug everything in but my gpu?!? when i install my gpu no display and when i plug in my old gpu (gtx 960) it flickers then shuts off almost immediately, i didnt have a display cord going to my 960 so that could be why it didnt turn on but any thoughts?
 
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