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February 1, 2012 12:32:40 AM

Just finished getting this system built up but alas! no POST; no video signal; no Keyboard lights; no HDD light on case and no beep from case speaker. Also the DR. Debug panel stays unlit. I am a bit at a loss not quite sure where to start

So far I have tried using one stick of ram I also tried booting off a mushkin blackline 2gb ddr3 1600 stick I have
I have tried using the HHD only and also using only the SSD
Reseated CPU and all ram also checked all connectors everything seems connected.
All fans are spinning.. is my MoBo probably DOA?

System build
ASRock Extrem3 MoBo http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Antec 500 watt psu http://www.newegg.com/Product/Product.aspx?Item=N82E168...
i7 2600 http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Corsair vengence 16GB http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Samsung 830 SSD http://www.newegg.com/Product/Product.aspx?Item=N82E168...
GTX560 ti http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Rosewill challenger case http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Seagate barracuda http://www.newegg.com/Product/Product.aspx?Item=N82E168...
coolermaster hyper 212 http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Asus DVD burner http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Windows 7 64bit pro


If anyone feels like pointing me in a good direction that would be greatly appreciated.

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February 1, 2012 1:13:41 AM

I've done just about all that with the exception of resetting the CMOS and BreadBoarding. Unless I somehow have the case speaker installed wrong (lol?) I am getting complete silence. I am running out of time tonight so I may try to breadboard it tomorrow I guess.
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a c 122 B Homebuilt system
February 1, 2012 6:55:46 AM

The following is an expansion of my troubleshooting tips in the breadboarding link in the "Cannot boot" thread.
http://www.tomshardware.com/forum/261145-31-read-postin...

I have tested the following beep patterns on Gigabyte, eVGA, and ECS motherboards. Other BIOS' may be different, but they all use a single short beep for a successful POST.

Breadboard - that will help isolate any kind of case problem you might have.
http://www.tomshardware.com/forum/262730-31-breadboardi...

Breadboard with just motherboard, CPU & HSF, case speaker, and PSU.

Make sure you plug the CPU power cable in. The system will not boot without it.

I always breadboard a new build. It takes only a few minutes, and you know you are putting good parts in the case once you are finished.

You can turn on the PC by momentarily shorting the two pins that the case power switch goes to. You should hear a series of long, single beeps indicating memory problems. Silence indicates a problem with (in most likely order) the PSU, motherboard, or CPU. Remember, at this time, you do not have a graphics card installed so the load on your PSU will be reduced.

If no beeps:
Running fans and drives and motherboard LED's do not necessarily indicate a good PSU. In the absence of a single short beep, they also do not indicate that the system is booting.

At this point, you can sort of check the PSU. Try to borrow a known good PSU of around 550 - 600 watts. That will power just about any system with a single GPU. If you cannot do that, use a DMM to measure the voltages. Measure between the colored wires and either chassis ground or the black wires. Yellow wires should be 12 volts. Red wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire (standby power supply): 5 volts always on. The green wire should also have 5 volts on it. It should go to 0 volts when you press the case power button (this is also a good way to test the power switch and the associated wiring), then back to 5 volts when you release the case power switch. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.

The green wire should be 5 volts whenever the PSU is plugged in and the PSU switch is on. It will drop to about 0 volts when the case switch is pressed and go back to 5 volts after it is released.

The gray wire is really important. It should go from 0 to +5 volts when you turn the PSU on with the case switch. CPU needs this signal to boot.

You can turn on the PSU by completely disconnecting the PSU and using a paperclip or jumper wire to short the green wire to one of the neighboring black wires.
http://www.youtube.com/watch?v=5FWXgQSokF4&feature=yout...

A way that might be easier is to use the main power plug. Working from the back of the plug where the wires come out, use a bare paperclip to short between the green wire and one of the neighboring black wires. That will do the same thing with an installed PSU. It is also an easy way to bypass a questionable case power switch.

This checks the PSU under no load conditions, so it is not completely reliable. But if it can not pass this, it is dead. Then repeat the checks with the PSU plugged into the computer to put a load on the PSU.

If the system beeps:
If it looks like the PSU is good, install a memory stick. Boot. Beep pattern should change to one long and several short beeps indicating a missing graphics card (unless you have on board graphics available). In that case, remove any card and connect the monitor cable to the motherboard connector.
Silence, long single beeps, or series of short beeps indicate a problem with the memory. If you get short beeps verify that the memory is in the appropriate motherboard slots.

Insert the video card and connect any necessary PCIe power connectors. Boot. At this point, the system should POST successfully (a single short beep). Notice that you do not need keyboard, mouse, monitor, or drives to successfully POST.
At this point, if the system doesn't work, it's either the video card or an inadequate PSU. Or rarely - the motherboard's PCIe interface.

Now start connecting the rest of the devices starting with the monitor, then keyboard and mouse, then the rest of the devices, testing after each step. It's possible that you can pass the POST with a defective video card. The POST routines can only check the video interface. It cannot check the internal parts of the video card.
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February 8, 2012 3:48:15 AM

Best answer selected by niacine.
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