New PC Build Won't Show on Computer Screen

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Unique187
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Hey guys, I've just built a new PC:

Intel i5 3570k
850W Corsair AX
8GB Vengeance RAM
P8Z77-V LK
I'm using the intel 4000 hd graphics on the CPU also, no GPU is installed yet.

The problem is, I press the power button and the PSU starts, the motherboard L.E.D shows, a red one by the 24 pin EATXPWR, and a green one by the SATA connection. So I know the motherboard is getting power.

I plugged a 2 x 4 pin EATX12V into where it's supposed to go.

The fan connected to the PSU starts, the other 2 connected to the motherboard don't.

The CPU fan also starts as well.

I'm not getting anything on my PC screen either using VGA cables, I tried it on my brothers laptop so I know the screen and cable is working.

Does anyone know what the problem could be?

Unique187
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Oh also, I haven't put anything into the Serial Port Connector or "COM1" on the motherboard, just for you information. :)

eire1274
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Okay, with the 2 case fans not starting, that's an indication that the motherboard isn't completing POST.

First item, disconnect the 24-pin and 8-pin power leads, remove the CPU, and look for any squashed pins. If it looks good, reinstall, reconnect the power leads, and try again.

Second, it may be memory issues. Verify that your memory is tagged to the correct specs (DDR3, 1333Mhz or faster). DDR2 memory will lock this board up.

Nick McDermott

david179057
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which mobo led?
i would also check all the wires are properly seated in the connecter

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Unique187
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I took the CPU out, put it back in, I'm pretty sure I installed it correctly. I have no idea what's wrong with the PC, I've even took all the other cables off and just tried it with the power cables and VGA cable in, and still nothing.

I've posted 2 pics up of how I've put in the power cables... I think they're right.

Pic 1 - 24 pin EATXPWR
http://imageshack.us/photo/my-images/521/20120715131341.jpg/

Pic 2 - 2 x 4 pin EATX12V
http://imageshack.us/photo/my-images/256/20120715131425.jpg/

When I power up the PC, it stays on for 10-15 seconds, and then turns itself off. I still haven't had any signal or anything on the PC screen either. :(

david179057
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which led was on?

eire1274
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Well, 10 seconds on and then out means it is powering up, sort of. If you have a short (ground to a power trace or to a power lead) the system will flick on and then immediately turn off (indicated by a fan twitching once and then stopping), and this isn't happening.

Sounds like you have a bad part. Problem is, it's hard to figure out which without being there.

Do you have any other memory to try?

Nick McDermott

Unique187
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The computer is staying on now, but still no signal on screen.

The red MemOk! L.E.D. is on continuously. I've pressed the button to try and configure it, but still doesn't work after trying different speeds. Haven't got any other DDR3 ram.

The RAM I've got is compatible with the motherboard as it's 1600mhz speed.

When I connect the 24pin EATXPWR cable to the PSU with the small detachable part the RAM light goes off, but when I put both of the power cables on the PSU the light comes back on. Both don't boot the PC up though.

xplaur
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Step 1: try another PSU.
Step 2 (if no result on step 1): using just one module of RAM, test every slot.

You can try also to test the platform assembled out of the case!

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eire1274
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Going over your board manual, there are several LEDs in that board area. Make sure it isn't for the GPU Boost feature, which has a switch right next to the MemOK! button. It has NO CONNECTION to the memory.

If the GPU Boost switch is set on, please turn it off, and try to start. That feature can sometimes (rarely) cause core i5/i7 CPUs to fail POST.

Nick McDermott

Unique187
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Tried everything guys and no luck, i bet its a faulty part. Its currently in a repair shop to see whats wrong with it. Should find out tomorrow hopefully!

Unique187
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Repair shop thinks they know what's wrong.

The pins where the CPU goes have been damaged on the motherboard (it was like that when it came, I remember looking at them and thinking, that doesn't look right).

But I tried to build it regardless, silly I know. Replacement is on its way.

So am I right in thinking, if the CPU isn't working what-so-ever because of the damaged pins on the motherboard, nothing will boot up?

Also, when you are installing a CPU, you just place it on gently, and then the lever on the motherboard does all the forceful part doesn't it?

xplaur
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1.No
2.Yes, but in the right position!

Solution: the CPU socket can be changed.

eire1274
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Squashed pins will get you every time.

The CPU is the brains of the machine, and the BIOS/UEFI POST routines need that brain to check things out. In some cases basic diagnostics can be handled and displayed via numeric output, but this is often seen only on higher-end pro equipment.

Nick McDermott

Unique187
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Thanks guys. New motherboard is here friday so hopefully it will be up and running soon. Surely there is no difference between the force used with your hands against the force used with the CPU lever? That thing squashes it with a lot of force ha.

eire1274
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Well, remember that when you set the CPU in, you are essentially just pressing the pins into a hollow cavity. There is no pressure along the shaft of the pin, just minimal pressure on the sides. When you lock the lever, you are pressing the socket contacts along the side of the pins as well, not pressing at the end and sending force along the pin shaft.

Nick McDermott

xplaur
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Make sure also that you set the CPU in the right position!

eire1274
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The issue wasn't a misaligned CPU, it was a damaged motherboard.

Nick McDermott

Unique187
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The CPU has little indents so should't be too difficult haha. I will also remember to place it on and not push it on.