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Yesterday I just finished building my new computer. IT was working fine and starting, but now it won't turn on. I've checked all the cables to make sure they're all connected correctly, but still can't seem to find the problem. Any help would be great. Thanks.

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What hardware are you using?

CPU: Intel Core i5 4690K @ 4.6Ghz CPU Cooler: Noctua NH-D15 GPU: GTX 1070 TI RAM: Crucial Ballistix Tactical 16GB (4x4) Mobo: ASUS Z97-PRO(Wi-Fi ac) PSU: Corsair RM Series RM750 Case: Fractal Design Define R4 no window

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Hardware specs? Will it post at all or just not boot into the OS? Error codes? etc.

CPU: i5 4670k • Cooler: Corsair H100i • Motherboard: MSI Z87 MPOWER • RAM: Crucial Ballistix Elite 2x 8GB • Storage: Samsung 840 250GB SSD, 2x WD Red 3TB • GPU: EVGA GTX 780 3GB • PSU: Corsair RM750W • Case: Corsair 750D • Mouse: Razer Naga 2012 (I actually use the thing for productivity/media buttons) • Keyboard: Ducky Shine 3 w/ Browns - Green LED • Monitor: Asus PB278Q 27" 2560 x 1440, ASUS PB238Q 23" 1920x1080 • Lighting: 2m NZXT Sleeved Blue LED Strip • pcpartpicker.com/p/3cHfZ

 

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One of your parts could be DOA

CPU: AMD FX-8120 | CPU Cooler: Thermaltake Contac 30 | Motherboard: GIGABYTE GA-990FXA-UD3 | Memory: Kingston 16GB (4 x 4GB) DDR3-1333 | Storage: WD 1TB | GPU: Gigabyte Radeon HD 7870 | Case: Thermaltake Chaser MK-I | PSU: Thermaltake Black Widow 850W

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Specs

Intel core 15 4670k

MOBO asus sabertooth z97

GPU GTX 770

PSU Corsair RM750w

 

I havn't hooked it up to the monitor yet because every time i try no matter what cable I'm using it says "no [insert cable here]" But I have managed to get the computer to turn on, where the fans a re spinning etc. It just won't turn on now for some reason.

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Specs

Intel core 15 4670k

MOBO asus sabertooth z97

GPU GTX 770

PSU Corsair RM750w

 

I havn't hooked it up to the monitor yet because every time i try no matter what cable I'm using it says "no [insert cable here]" But I have managed to get the computer to turn on, where the fans a re spinning etc. It just won't turn on now for some reason.

is there any beeps and its an i5 not 15

My Setup :P

Spoiler

Skylake: I7-6700|MSI B150 GAMING M3|16GB GSKILL RIPJAWS V|R9 280X (WILL BE 1070)|CRUCIAL MX300 + WD BLACK 1TB

 

 

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Specs

Intel core 15 4670k

MOBO asus sabertooth z97

GPU GTX 770

PSU Corsair RM750w

 

I havn't hooked it up to the monitor yet because every time i try no matter what cable I'm using it says "no [insert cable here]" But I have managed to get the computer to turn on, where the fans a re spinning etc. It just won't turn on now for some reason.

Have you plugged the video cables into the graphics card, rather than mobo video out? If it's a hardware issue, a working graphics output could give you a helpful post code.

CPU: i5 4670k • Cooler: Corsair H100i • Motherboard: MSI Z87 MPOWER • RAM: Crucial Ballistix Elite 2x 8GB • Storage: Samsung 840 250GB SSD, 2x WD Red 3TB • GPU: EVGA GTX 780 3GB • PSU: Corsair RM750W • Case: Corsair 750D • Mouse: Razer Naga 2012 (I actually use the thing for productivity/media buttons) • Keyboard: Ducky Shine 3 w/ Browns - Green LED • Monitor: Asus PB278Q 27" 2560 x 1440, ASUS PB238Q 23" 1920x1080 • Lighting: 2m NZXT Sleeved Blue LED Strip • pcpartpicker.com/p/3cHfZ

 

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Have you plugged the video cables into the graphics card, rather than mobo video out? If it's a hardware issue, a working graphics output could give you a helpful post code.

Yeah, I've tried to use display port, VGA, HDMI, and DVI from the graphics card, and the MOBO, but it still won't recognize it.;

 

is there any beeps and its an i5 not 15

It hasn't made any noise, since it won't turn on.

 

Did you check the power supply, the is the voltage switch and the on/off switch.....voltage should be 115 i think and the switch should be in the on position

I have the O/I switch on O, but I'm not sure what you mean by checking the voltage.

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Yeah, I've tried to use display port, VGA, HDMI, and DVI from the graphics card, and the MOBO, but it still won't recognize it.;

How about using the mobo video outs without a graphics card installed?

CPU: i5 4670k • Cooler: Corsair H100i • Motherboard: MSI Z87 MPOWER • RAM: Crucial Ballistix Elite 2x 8GB • Storage: Samsung 840 250GB SSD, 2x WD Red 3TB • GPU: EVGA GTX 780 3GB • PSU: Corsair RM750W • Case: Corsair 750D • Mouse: Razer Naga 2012 (I actually use the thing for productivity/media buttons) • Keyboard: Ducky Shine 3 w/ Browns - Green LED • Monitor: Asus PB278Q 27" 2560 x 1440, ASUS PB238Q 23" 1920x1080 • Lighting: 2m NZXT Sleeved Blue LED Strip • pcpartpicker.com/p/3cHfZ

 

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There could be somethign wrong with the startbutton if the PC won't do anythign at all when you press it.

 

Try to plug out the Start button and touch the startpins with a screwdriver or something to make sure that it is not the startbutton which is causing the issue

 

(damn mod queue)

[spoiler= Dream machine (There is also a buildlog)]

Case: Phanteks Enthoo Luxe - CPU: I7 5820k @4.4 ghz 1.225vcore - GPU: 2x Asus GTX 970 Strix edition - Mainboard: Asus X99-S - RAM: HyperX predator 4x4 2133 mhz - HDD: Seagate barracuda 2 TB 7200 rpm - SSD: Samsung 850 EVO 500 GB SSD - PSU: Corsair HX1000i - Case fans: 3x Noctua PPC 140mm - Radiator fans: 3x Noctua PPC 120 mm - CPU cooler: Fractal design Kelvin S36 together with Noctua PPCs - Keyboard: Corsair K70 RGB Cherry gaming keyboard - mouse: Steelseries sensei raw - Headset: Kingston HyperX Cloud Build Log

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I have the O/I switch on O, but I'm not sure what you mean by checking the voltage.

Switch should be on I, with the I pushed down...the voltage switch is flat, sometimes red and has the numbers 115 and 200 on it or 220....that should be on 115 if your in the US

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