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No signal with newly built pc.

1130 Views 16 Replies 4 Participants Last post by  Flamemastr07
Everything is connected correctly (as far as i can tell) and when i boot up everything hums beautifully. The problem....there is no signal to monitor (or tv in my case via hdmi). No beeps on boot. Checks graphic card its in tight and both cables are plugged in. the 8 pin plug and 24 pin plug are both plugged in. Anymore suggestions? Thanks ahead of time.
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Post the specs of the PC.

MB-CPU-RAM-GPU-PSU brand/wattage

Bench Test the components to rule out a short.
I'm new to do this so forgive me if i forget something

i have a MSI 870-G55 MB
AMD Phenom II x6 CPU
Corsair XMS DDR3 8GB RAM
Radeon HD 5870 Sapphire Eyefinity 6 edition GPU
PC Power and Cooling Silencer 750 Quad Red 750W ATX12V / EPS12V SLI Certified 80 PLUS Certified Active PFC Power Supply PSU
Try it with a PC monitor.
I'm heading to my uncles now he is a monitor I can test it with. I'll post results when i return.
Just tested with monitor and even tried different GPU and still no luck anyone have any ideas?
Brand & Model of Mobo-CPU-RAM-Graphics-PSU?

All new builds should be tested on the bencj prior to assembling in the case to avoid problems.
Bench Test
Remove EVERYTHING from the case.
Set the motherboard on a non conductive surface. The motherboard box is perfect for this. DO NOT PLACE THE MOTHERBOARD ON THE STATIC BAG! It can actually conduct electricity!
Install the CPU and heat sink.
Install 1 stick of RAM.
Install the video card and attach the power supply connection(s) to the card if your card needs it.
Connect the monitor to the video card.
Connect the power supply to the motherboard with both the 24pin main ATX Power connection and the separate 4 or 8 pin power connection.
Connect power to the power supply.
Do NOT connect ANYTHING else. Make sure you have the power connector on the CPU fan connected.
Use a small screwdriver to momentarily short the power switch connector on the motherboard. Consult your motherboard manual to find which two pins connect to your case's power switch. Then touch both pins with a screwdriver to complete the circuit and boot the system.

If all is well, it should power up and you should get a display. Then assemble the parts into the case and try again. If the system now fails to boot, you have a short in the case and need to recheck your motherboard standoffs.

If the system does not boot after this process, then you most likely have a faulty component. You'll need to swap parts, start with the power supply, until you determine what is defective.
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Before I bench test I would like to note that the keyboard lights do not stay lit but the mouse light will. Could the mobo possible be fried again?
That's a possibility and bench testing will help get you to the problem. When you remove the Mobo inspect both sides for any burned marks and look at the capacitors for any signs of swelling or leakage.
Did a bench test with no successful results even after swapping all the parts.
What parts did you use for the swap?
Remove all the RAM and boot. You should hear a repeated single beep from the Mobo speaker. If you hear the single repeated beep the Mobo is probably OK.
I swapped a graphic card, PSU, tried with one ram, but ill gladly check in the morning with no ram and see if i hear a beep.
Ok so I removed the RAM completely but I'm not getting any beeps.
That is generally a sign of a bad Mobo.
This will be the second motherboard i would have to send back. I sent one back short after my order got here due to the same problem. Any idea would could be causing them to go bad.
I may be talking nonsense but perhaps you're not handling them correctly? Static electricity, perhaps?
Considering I've worked on computers before and never had that problem i doubt its improper handling or static electricity. I did buy a refurbished PSU though starting to think that might be causing some of my problems.
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