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One of my new components is faulty.

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January 30, 2011 9:24:59 AM

Hi everyone, I have recently bought a set of brand new components so that I could build a new PC. Now I was pretty disappointed to find out that it wouldn't boot. I know all of the components are compatible with each other and I have followed all of the troubleshooting steps listed at the top of the forums. Now i have managed to eliminate a few of the components and I am currently left with 2 components which I cant test, the mother board and the RAM. I personally think that I have a faulty motherboard as neither stick of ram works on its own and I don't think I would receive two dead RAM modules. I would very much like a second opinion on the matter. thank you for reading.

Here is a list of the components I'm using.

AMD Athlon II X3 445 3.1ghz
Asus M4N68T-M LE V2 motherboard
4gb (2x2gb) of ddr3 1333mhz RAM
HD 5770 1GB
Samsung 500gb 7200rpm hard drive
Xenta 700W PSU

More about : components faulty

a b B Homebuilt system
a b V Motherboard
January 30, 2011 10:14:30 AM

Is your RAM on the QVL for that motherboard? Also, I've never heard of Xenta PSUs before...could be a part of the problem..
January 30, 2011 10:21:33 AM

I hadn't actually heard of the brand either but it works fine with my other motherboard with the x3 processor and the hd 5770 which is why i assumed its fine
here's a link to the psu anyway http://www.ebuyer.com/product/219541
the memory isn't on the qvl as its ebuyers extra value ram http://www.ebuyer.com/product/192049 I cant actually test the ram as i dont have another ddr3 motherboard. It could be dead ram but i personally don't think i've recieved two dead modules.
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a b B Homebuilt system
a b V Motherboard
January 30, 2011 12:11:32 PM

mcstagg said:
I hadn't actually heard of the brand either but it works fine with my other motherboard with the x3 processor and the hd 5770 which is why i assumed its fine
here's a link to the psu anyway http://www.ebuyer.com/product/219541
the memory isn't on the qvl as its ebuyers extra value ram http://www.ebuyer.com/product/192049 I cant actually test the ram as i dont have another ddr3 motherboard. It could be dead ram but i personally don't think i've recieved two dead modules.


I wasn't suggesting that the ram was dead, :non:  merely that it might not be compatible with your motherboard :ouch: 

As far as the PSU goes, it is an older one without APC (it has a voltage selector switch) and an unknown brand so we don't know how accurate the wattage rating is. Looking closely at the picture in the link you provided(which is of a 600 watt PSU, so we have no idea how many amps are available on the +12V rail), that could be the cause of your issues. :o 

Never cheap out on the PSU :non:  . It will only cause you troubles in the long run. Get one from a quality brand like Corsair, Seasonic, OCZ, PCP&C, or Antec Earthwatts. :bounce: 
a b B Homebuilt system
a b V Motherboard
January 30, 2011 3:07:28 PM

mcstagg said:
Ok i've taken a picture of all the information written on my power supply http://img10.imageshack.us/i/img0011xx.jpg/

The label shows that you only have 32 amps on the +12volt rail and that's at 230 volt input. That works out to only 384 total watts, very loowww for a 700 watt PSU. :heink:  :cry: 

Here is an ANTEC 620 wattPSU that has 48 amps on the 12 volt rail:
http://www.newegg.com/Product/Product.aspx?Item=N82E168... :D 

even this 500watt Corsair has 34 amps:
http://www.newegg.com/Product/Product.aspx?Item=N82E168... :ouch: 
January 30, 2011 3:31:10 PM

clarkjd said:
The label shows that you only have 32 amps on the +12volt rail and that's at 230 volt input. That works out to only 384 total watts, very loowww for a 700 watt PSU. :heink:  :cry: 

Here is an ANTEC 620 wattPSU that has 48 amps on the 12 volt rail:
http://www.newegg.com/Product/Product.aspx?Item=N82E168... :D 

even this 500watt Corsair has 34 amps:
http://www.newegg.com/Product/Product.aspx?Item=N82E168... :ouch: 


Yeah its definately not great but surely it would be sufficient to at least power up the pc with only the CPU and one stick of RAM installed :heink: 

I'm not ruling it out but lets say the power supply is running at the specs it says on the label, would that be enough boot the system with only the cpu and ram installed?

also I've had a look at another motherboard which at the moment is on special offer with a stick of ram which is on the qvl for the motherboard i'm thinking that maybe i should just get my money back for the cheap motherboard and RAM and get that instead i'm not too sure if it will affect performance running single channel RAM but at least it will be compatible.

Anyway thank you for helping me out so far :) 
a b B Homebuilt system
a b V Motherboard
January 30, 2011 6:20:01 PM

mcstagg said:
Yeah its definately not great but surely it would be sufficient to at least power up the pc with only the CPU and one stick of RAM installed :heink: 

I'm not ruling it out but lets say the power supply is running at the specs it says on the label, would that be enough boot the system with only the cpu and ram installed?

also I've had a look at another motherboard which at the moment is on special offer with a stick of ram which is on the qvl for the motherboard i'm thinking that maybe i should just get my money back for the cheap motherboard and RAM and get that instead i'm not too sure if it will affect performance running single channel RAM but at least it will be compatible.

Anyway thank you for helping me out so far :) 

Assuming it meets the published specs, then it should be enough to boot the system. You've got to realize that today's pc run mostly on the 12 volt rail(CPU, GPU, HDD, ODD, ) That's why you need as many amps as you can get on the +12 rails.
a c 122 B Homebuilt system
a c 156 V Motherboard
January 30, 2011 6:29:22 PM

Try this:
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.
January 31, 2011 1:02:31 PM

Ok so today I got hold of a motherboard speaker and followed the steps you gave me, with just the cpu and fan installed i recieved 1 long and 2 short beeps indicating missing memory. once i installed the memory however it was silent and didnt post. does this mean the memory is faulty or incompatible?
!