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Switched cases, boots but no display.

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  • Cases
  • Display
  • Components
Last response: in Components
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August 3, 2014 4:50:51 PM

I switched cases today to a H440 and have everything installed, but upon booting the lights and fans turn on but I get no display at all. I've tried moving RAM to no avail, I've cleared the CMOS, tried different display ports, nothing. The parts were functioning correctly just before switching cases. One thing to note is I could never once enter the BIOS before I switched cases, it just appeared at the Win8 lock screen. The motherboard is a MS-7778, 12GB Corsair Vengeance, 650Ti, and an A8-something processor. It was all (aside from the GPU and RAM) part of a prebuilt HP Pavilion computer.
I switched cases so my R9 290 would fit. If something broke I guess it isn't the end of the world as I'll also be getting a new mobo, CPU, and cooler. I've looked at everything online and I just can't get it to "go".

Just to clarify, I don't have the 290 yet, it's on its way to me from newegg.

More about : switched cases boots display

August 3, 2014 4:55:22 PM

Ensure that your 4/8 pin cpu connector is plugged into the motherboard and i will get back with you on more troubleshooting.
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August 3, 2014 5:00:01 PM

Yes, a four pin connector labeled CPU is clicked in.
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August 3, 2014 5:06:16 PM

Was the heatsink on the cpu shifted or handled? Its possible the shifting of the cpu heatsink has created a large enough disconnect between the mainboard and the cpu. Usually this happens when the motherboard is handled by the cpu heatsink. To remove it, disconnect any screws are clips but do not tug on the heatsink. Instead rotate it until it comes loose. Then you may release the clip for the cpu itself. Repaste, reseat, and reassemble.

Tugging to remove the heatsink can irreversibly damage your cpu or motherboard pins. The cpu will forcibly come out while the cpu is clipped to the motherboard and the heatsink has solidified paste. Please ensure you follow all safety precautions. Ground to chassis and do not touch pins.
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August 3, 2014 5:09:39 PM

I didn't touch the heatsink at all, I picked up the mobo touching the RAM slots and PCI-E slots. One thing I suppose could've happen is I might've bumped one of the battery like things on the mobo. None of them look especially bent, but they aren't all completely straight either.

And I don't mean to disregard your previous answer, but I don't have any paste around at the moment. (: But I know for a fact I did not touch the heatsink, aside from some minor brushing to plug in the CPU, etc.
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August 3, 2014 5:16:03 PM

Push down on the cpu heatsink with a few pounds of pressure but nothing extensive enough to bend the board. Also verify that all your standoffs are in place prior to doing this to prevent case shorting. You did transfer the standoffs correct? Then attempt to turn on your pc and note any changes. Then push the heatsink up towards top, bottom, front, back of case in different start sequences.

The battery type things on the boards are called capacitors. They are able to be bent to certain degrees safely.

Is your hard drive light on the front ticking during boot? Does the numlock button on the keyboard light respond?
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August 3, 2014 5:39:56 PM

Well I can't really find the HDD LED on this case..(: I can feel the HDD moving, if that counts for anything. The keyboard and mouse don't light up at all. As far as standoffs, everything is good, although the is one standoff in the middle of the board that doesn't have a screw, instead it's just rounded off. It was pretty installed so I just went with it. Should I try swapping that standoff for a normal one?

Pressuring the heatsink changed nothing. :/ 
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August 3, 2014 6:13:20 PM

I swapped the aforementioned standoff and no luck still.
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August 3, 2014 6:43:58 PM

You did install the motherboard standoffs for the new case prior to turning it on though correct? You will need to verify that the components are all receiving power and connection or the system will not POST. Start by removing all nonessential components. GPU. HDDs. DVD roms. Disconnect case fans. As far as components you should only have the motherboard, PSU, CPU, cpu fan, and RAM attached. You should only have a keyboard attached. If you can get the numlock light to cycle that means the computer is functioning past POST.

Pull off the 24 pin connector off the main board and look at the pins inside the connector. They will look like a cube with a notch cut out. Verify that all the pins on the connector are uniform. Generally any degree in variance is unacceptable. You can usually correct these variances by bending them back into the correct shape with a precision screw driver the approximate size of the pin. I have had these connectors on the psu become bent just enough to where they do not make enough contact amd the system does not post. Inspect the pins on the mainboard as well to verify they are all present and the correct height. There is no correction steps that I know of for motherboard pins. I've only had to make adjustments on about three of every thousand computers because they would not post.

The mouse not lighting up at all is a sign the board or cpu is not receiving power. This is why i bring up the psu. At this point there is an isolated issue between the psu, the motherboard, and the cpu. Its very unlikely the ram would be a culprit to prevent a POST unless you handled the sticks by the pins at all and also you get no usb power.

USB is on a five volt rail. All the red cables are 5v rails on the psu.
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August 4, 2014 4:05:07 PM

The num lock key does not cycle. And yes, the standoffs were set up prior to installing the mobo. And the pins look good to me. The only bent pins I've encountered are for the USB 3.0 port, but that's for the case USBs and I'm not even using those.
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