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Fans, No video

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August 4, 2010 3:25:42 PM

Read the stickies, how-to's and checklists on this forum, but I'm still completely stuck with my new build. Put it together last night, but I just can't get it to boot.

I get fans, some noises but no beeps since I don't have a system speaker installed.
No video at all.
Mouse does not light up.
I can still shut off the computer by holding down the power button for ~5 seconds.

Here's what I've done so far:

-Swapped out the video card with one I know works. Nothing still.
-Swapped out the ram. Still nothing.
-MB is properly mounted using standoffs, no other possible causes of a short that I can see.
-Removed everything not absolutely necessary (sound, wireless card)

Here are the components I'm using right now:

Antec VSK-2000 Black ATX Mid Tower Computer Case
Antec EarthWatts Green EA-380D Green 380W Continuous power ATX12V v2.3 / EPS12V PSU
ASRock M3A770DE AM3 AMD 770 ATX AMD Motherboard
AMD Athlon II X2 250 Regor 3.0GHz Socket AM3 65W Dual-Core Processor
A-DATA Gaming Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)
ASUS EN8400GS Silent/P/512M GeForce 8400 GS 512MB 64-bit DDR2 PCI Express 2.0 x16
ASUS DRW-24B1ST/BLK/B/AS Black SATA 24X DVD Burner
Western Digital Blue 160GB Hard Drive

I'm hoping it's something relatively minor I'm overlooking...but I have this creeping feeling that something was DOA (MB or CPU). Let me know if there is any other information I can provide. Any help is appreciated!

More about : fans video

August 4, 2010 5:56:51 PM

I doubt it's your CPU or Mobo. I agree with Drakoes, try another Power Supply. That low amount of wattage makes me worry.
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August 5, 2010 2:28:49 AM

The only used component is the hard drive, but I reset the CMOS anyway. No change.

I stopped by Micro Center today and picked up a new power supply. CoolerMaster 460W was on sale. I plan on installing that tomorrow morning, we'll see if that does anything.

I also picked up a system speaker. Just put that in and turned on the power but I'm getting nothing from it. No beeps. Not sure what that means, looking into it now.

Thanks again for your help guys.

Best solution

a c 122 B Homebuilt system
August 5, 2010 7:40:52 AM
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You have worked through our standard checklist and troubleshooting thread:
http://www.tomshardware.com/forum/261145-31-read-postin...
yes? I mean work through, not just read over it.

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

The breadboarding thread has a paragraph about how to build and test a PC in stages.

Breadboard with just motherboard, CPU & HSF, case speaker, and PSU. You really, really need a case speaker with a dead system. Otherwise, you are just randomly changing parts, until something works.

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.

By the way, your original Antec PSU has enough power to run your system if it is working properly. I would never replace a working Antec 380 with a Coolermaster PSU. The lower powered CM's are about two small steps above junk.

At this point, you can sort of check the PSU. Try to borrow a known good PSU. 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: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.

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...

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 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. Silence or long single beeps indicate a problem with the memory.

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.

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.
August 5, 2010 4:28:46 PM

Wow. Thanks for such a lengthy reply! I'm finally starting to feel a little hopeful that this computer will one day turn on.

I just did my first breadboard (fun!) but the results did not make me happy. No beeps whatsoever, and all that I have hooked up are the MB, CPU/HS and PSU. I tried it with another PSU since I don't have a DMM and got the same result...silence.

So it would seem like I have a dead MB or CPU on my hands...but how to tell which?
August 5, 2010 5:06:14 PM

Ignore my stupid question at the end of the last post...

A friend of mine nearby has the same motherboard. I know because I helped him build that system. Sidenote: His turned on immediately, first try :) 

I'm gonna swing by, and breadboard with his MB, my CPU. That should help me figure out which is the culprit.
August 5, 2010 6:01:30 PM

Ok, so I was able to put his CPU in my MB - power, fans, lights, but no beeps at all. I'm thinking my MB is dead. I'm going to try my CPU in his MB just to make sure there's nothing wrong with that too, but as it stands, I think this board is going back to Newegg.

I appreciate all of the advice, this forum really is the best. Wish I knew about it sooner. Let me know if there are any steps I'm skipping or anything else I should be looking for.
August 5, 2010 6:02:10 PM

Best answer selected by mmmmmmbeer.
August 5, 2010 6:19:16 PM

Did the breadboard setup with my friend's MB and my CPU. Posted successfully! So there we have it, my motherboard was DOA.

Thanks again!!!
!