No Video Display after installting Intel Core i7-6700

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KrizmKazm

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Aug 4, 2015
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My Current Build:

Motherboard: MSI Z170A GAMING PRO W/LIGHTING ATX 3WAY SLI/CROSSFIRE ULTRA M.2 USB 3.1

Power Supply: 600 WATT 80 PLUS

Ram: ADATA XPG Z1 8GB (2 x 4GB) 288-Pin DDR4 SDRAM DDR4 2800 (PC4 22400) Desktop Memory Model AX4U2800W4G17-DRZ

Video Card: MSI GeForce GTX 1070 Ti DirectX 12 GTX 1070 Ti DUKE 8G 8GB 256-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support

CPU: Intel Core i7-6700 Skylake Quad-Core 3.4 GHz LGA 1151 65W CM8066201920103 Desktop Processor Intel HD Graphics 530



My Problem:

After installing my new Intel Core i7-6700 CPU, I do not get a video display when booting. There are no error beeps and all the fans are spinning and lights are running, just no video. Even when I try putting my old CPU back in to revert o my previous set up, I get the same result. I was very careful when installing to not bend any sensitive pins on the CPU itself. I'm 90% sure the new CPU is compatible with my system, but can anyone confirm?


Things I've already tried:

I reset the CMOS.

I tried unplugging all components not necessary for booting (USB devices, RAM, etc).



Any help is appreciated.

Thanks!
 
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Make sure you didn't accidentally connect the display to the motherboard video output when you put it back together, if you disconnected the display to start with. Very easy to forget that there are separate video outputs in the same area and that some of them are from the integrated CPU graphics, not the graphics card. If that fails to be the issue, try removing the GPU card and TRYING the integrated CPU graphics outputs on the motherboard to see if that works.

Also, if you disconnected any cabling going to the graphics card, make sure you reconnected the PCI power connectors to it afterwards.
 
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Thanks for the reply!
I tried using the onboard video, same result. I tried using the video card and checking all the cables, same result.

There is also no beeping when it boots. Usually, I would get 1 beep before it starts loading windows, but I'm not hearing anything now.

The weirdest thing to me is that I can't get a display even using the original CPU, which was working fine a few days ago.

Any other ideas?
 
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Try a different monitor cable. Try a different TYPE of monitor cable. Try a different monitor. To me, everything is pointing, at least initially, to the fact that the system is running but the monitor is not working or is not getting the signal.

Are you getting the "no signal" display on the monitor?

When you tried the onboard video, did you completely remove the graphics card from the system? Because you need to, especially if there is a problem with the card.
 
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Right now, it's hooked up via HDMI to a 75" TV. On the TV, the "PC HDMI" input highlights once the computer starts, so I know the cable is OK, but it says to check the source because there is no signal. I will try a different monitor tonight. I'll even try using a VGA cable.

When I tried using the onboard video, I did disconnect the video card from the system.

My 2 biggest questions are:

Shouldn't I still hear the single *BEEP* when booting my system if it was just a monitor/cable issue?

Why would I have this problem even after loading my previous CPU, which was working fine a week ago?

 
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Hmm, is this the cable that goes from the power supply to the video card? I'm at work at the moment, but I believe there is an 8-pin cable, then a 4-pin cable right next to it, that both plug into the video card.



Thank you for confirming that. At least I know I made the right purchase.... hopefully.
 
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There are no four pin cables that plug into video cards that I am aware of. Six pin and eight pin only.

Likely, assuming no pins were bent on the motherboard during this process, it is not a CPU problem. You might want to remove the CPU and check the motherboard pin bed very closely with a magnifying glass or using high powered reading glasses. It is VERY hard to see damaged pins sometimes. It only takes ONE pin to be slightly deformed to cause just about any kind of issue you can think of.

I would certainly try another monitor first. Also a different cable if that doesn't result in anything. Different KIND of cable that is. DVI or VGA to a different monitor.

Double check ALL of these, especially that the motherboard 8 pin EPS connector and 24 pin ATX connectors are fully seated. Make sure the memory is fully seated as well.

http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems
 
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It is one of the two cables that go to the mobo from PSU. One has 24 pins and other 4/8 pins and power the CPU. Check it is in correct way.
 
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It is VERY difficult, and success is low, on the home user ever repairing a pin bed. If it's only like one pin, and you have the proper tools plus magnification, you MIGHT get lucky if the pin didn't break off below the level of the silicon, but it's unlikely. Almost always the only fix is a new board. You must be very careful when installing CPUs and 100% install them straight down.

If it does not FULLY drop into the correct position using it's own weight only, then something is usually wrong.
 
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Well you can bend them back, for that you'll need a nose pliers, tweezers, very sharp and pointy knife and a magnifying glas to see what you're doing. When you look trough the magnifying glas, look at the surrounding pins to see how they are formed, and after that you should be able to VERY gently bend those pins back into the right position. Here's a couple of guides how to do this procedure:
https://www.youtube.com/watch?v=O1H5_FVX9lU&t=31s
https://www.youtube.com/watch?v=dd_vhLd8ykc

 
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I think the damage actually occurred when I was removing the old CPU. That little metal gate that secures it is spring loaded and was trying to snap shut while I was taking the old CPU out. Sigh...

Thanks for all the help.
 
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Thanks! I may give it a shot, considering I have nothing left to loose.
 
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It's actually NOT worth trying, unless you have minimal damage and are fairly competent with small electronics, or are very handy in general. Reason being, if something is not bent exactly right or a small amount the wrong way, you may end up with a shorted CPU in addition to a damaged motherboard. If it's only one or two bent pins and you have ample magnification plus very tiny tools, you might be successful. Anything more than that, OR if there is significantly altered pin array, success is unlikely while further damage is probable. Good luck with your efforts though.
 
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So, I ended up buying a used motherboard as a replacement - SKYLAKE Z170A GAMING M7 LGA1151
https://www.amazon.com/gp/product/B0131GA4PK/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

Installation of the motherboard went smooth, but the issue remains. The PC starts, fans run, lights are on, no errors beeps and no display.

It looks very similar to my last one, and uses the same socket type. Before I start pulling my hair out - this SHOULD work with the new processor, right?

 
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Thanks! So, I finally got everything up and working again :)

It was a combination of issues...

Like you mentioned above, I believe the bent pins on the previous motherboard shorted out the old CPU, which is what I was using to test, since I knew it was previously working. The would explain why the old CPU stopped working with the old motherboard.

It also seems like my HDMI Out on the video card doesn't work, but the DVI does, so I was getting some inconsistencies when testing video outputs and different cable types.

It also seems that I don't have an internal speaker, which is why I never heard any beeps when booting :/

The new motherboard, along with a new Windows Installation, seems to have fixed all my previous issues.

Thanks again for all the help.

 
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