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First build somethings wrong need help

Last response: in Motherboards
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May 15, 2012 12:03:59 AM

I go to start a test run with my new cpu (Phenom II X4 965) mobo (Asus M5A78L-M LX PLUS) ram (4gigs of ddr3 1333) and PSU (400w) and everything starts but no display. I used my 6670 from my old computer and I know it works but still no display. Can someone tell me whats part of my build might be DOA?

More about : build somethings wrong

May 15, 2012 1:46:40 AM

Well this is just a shot in the dark but it could be the PSU. IDK if a 400w PSU can provide enough power to power the 6670 Graphics Card. It could also be that you didn't plug in the Graphics Card correctly, try taking the card out CAREFULLY then maybe blowing any debris out and again Carefully putting the card back. But still my best guess is the first.
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May 15, 2012 2:00:22 AM

try a BIOS update maybe? do you have onboard graphics or another GPU to test? make sure RAM is in all the way because on some mobos its very hard to push in, happens all the time with newbies because they are very careful. i did this my first time when i was 11 rebuilding my dads crappy pentium 4 desktop. its definitely not your PSU because that card uses only 66W. if you have spare parts, swap them around and test to see if it will boot with different parts then identify which part is causing the problem.
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May 15, 2012 2:07:24 AM

Yah listen to him he sounds like he knows what he is doin. Like I said just takin a shot in the dark, obviously I missed. However if you were to do any upgrades to your PC such as an aftermarket processor fan, better Graphics card, etc. I would suggest upgrading to a 750w PSU.
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Anonymous
a b V Motherboard
May 15, 2012 2:52:09 AM

take the motherboard out of the case, set it on non conductive material such as the box it came in. put in the cpu/heatsink and one stick of ram. see if it starts.
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a c 156 V Motherboard
May 15, 2012 4:06:04 AM

A 6670 only needs about 60 watts from the PSU. Any decent, working 400 watt PSU can power this card.

First, what brand and model of PSU? There is a lot of junk out there, especially in the 500 watts and smaller PSU's. Try the PSU from your old computer.

Second, check this:
http://www.tomshardware.co.uk/forum/274745-13-step-step...
to make sure you didn't overlook something simple.

Third, work systematically through our standard checklist and troubleshooting thread:
http://www.tomshardware.com/forum/261145-31-read-postin...
I mean work through, not just read over it. We spent a lot of time on this. It should find most of the problems.

Fourth:
The following is an expansion of my troubleshooting tips in the breadboarding link in the "Cannot boot" thread.

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: 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...

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.

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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May 15, 2012 4:08:58 AM

ummm no idea wht just happened up there ^
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May 15, 2012 7:56:32 AM

I put my 6670 back in the computer Im using now and it works fine. I used the onboard graphics but still no display on my monitor. I don't think it's my power supply because I see it turn on and I hear all the fans.
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May 15, 2012 8:02:42 AM

Anonymous said:
take the motherboard out of the case, set it on non conductive material such as the box it came in. put in the cpu/heatsink and one stick of ram. see if it starts.

That's what I was doing, testing the parts that came in while I wait for my case and hard drive. It looks like everything started but my monitor says no Display and I'm stuck wondering what it is wrong with it.
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a c 471 V Motherboard
May 15, 2012 9:50:04 AM

checked the mb bios list and it cpu list. the mb with bios 302 should post with your cpu. the only thing i can see is the ram you have is not on the mb list.
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May 16, 2012 5:08:12 AM

jsc said:
A 6670 only needs about 60 watts from the PSU. Any decent, working 400 watt PSU can power this card.

First, what brand and model of PSU? There is a lot of junk out there, especially in the 500 watts and smaller PSU's. Try the PSU from your old computer.

Second, check this:
http://www.tomshardware.co.uk/forum/274745-13-step-step...
to make sure you didn't overlook something simple.

Third, work systematically through our standard checklist and troubleshooting thread:
http://www.tomshardware.com/forum/261145-31-read-postin...
I mean work through, not just read over it. We spent a lot of time on this. It should find most of the problems.

Fourth:
The following is an expansion of my troubleshooting tips in the breadboarding link in the "Cannot boot" thread.
Thanks for the help, I narrowed it down to the psu and found out that the 4pin was defective. RMAing it now.
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: 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...

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.

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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Anonymous
a b V Motherboard
May 16, 2012 5:39:08 AM

so i am doubting that you have a speaker connected so you can tell if you get a beep signal or not.
no beep, DOA board.
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