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New Build won't post

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  • Systems
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March 22, 2011 10:44:21 AM

Hello all,
After doing much research and troubleshooting I came across this forum and even tried the checklist of things given. I just bought a barebone kit from Tigerdirect and built it. The specs are:
Biostar N68S+ Quad Core Diablotek Barebones Kit -
Biostar N68S+ Mobo,
AMD Phenom X4 9100e CPU,
CPU Fan,
Centon 2GB DDR2 RAM,
Seagate 500GB HDD, 24x DVDRW,
Diablotek Mid-Tower Case,
Diablotek 400W PSU.

I have installed everything correctly to my knowledge and when I push the power button the red power led flashes on the front, the dvd drive light flashes, the cpu cooling fan spins, and the psu fan spins but everything only comes on for a second and then dies. There is no other output to video or peripherals. I have been reading alot around here, do you think its the psu or a bad mobo?

Thanks alot for your help,
Zach

More about : build post

a c 90 B Homebuilt system
March 22, 2011 10:53:06 AM

Hello ztm0802;

It would be a good idea to take a careful run through the forum's "System won't boot" checklist
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March 22, 2011 11:24:39 AM

I went through the checklist already and did everything twice by now. I am still getting the same results.
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Related resources
a c 90 B Homebuilt system
March 22, 2011 11:32:36 AM

Including the 'breadboard' suggestion?

Then you're pretty much at the point where you need to replace each part with a known 'good' working part.
That should let you narrow down the problems part.
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March 24, 2011 12:13:53 AM

ztm0802 said:
Hello all,
After doing much research and troubleshooting I came across this forum and even tried the checklist of things given. I just bought a barebone kit from Tigerdirect and built it. The specs are:
Biostar N68S+ Quad Core Diablotek Barebones Kit -
Biostar N68S+ Mobo,
AMD Phenom X4 9100e CPU,
CPU Fan,
Centon 2GB DDR2 RAM,
Seagate 500GB HDD, 24x DVDRW,
Diablotek Mid-Tower Case,
Diablotek 400W PSU.

I have installed everything correctly to my knowledge and when I push the power button the red power led flashes on the front, the dvd drive light flashes, the cpu cooling fan spins, and the psu fan spins but everything only comes on for a second and then dies. There is no other output to video or peripherals. I have been reading alot around here, do you think its the psu or a bad mobo?

Thanks alot for your help,
Zach


I just recieved the exact same system as you from Tigerdirect & have the exact same issue! Did you find a solution yet?
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March 24, 2011 2:13:24 AM

Did you remember to screw in the risers? When i had that problem that fixed it for me
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a c 122 B Homebuilt system
March 24, 2011 8:43:04 AM

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 you do get silence at this point, the first thing I would replace would be the PSU. Diablotek PSU's are one step above junk.

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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March 24, 2011 9:13:04 AM

I am being sent a new power supply so hopefully that will be the issue. Although the one i have is a 24pin supply and I tested it on a 20-pin motherboard without the 4-pin extension and it turned on that board just fine. I took the 20-pin one from that other machine and used it on the new board and turned on all the fans and lights but thats all it did it didn't post. Buddy, what are the risers you are referring to?
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March 24, 2011 11:23:06 AM

I am getting no outputs to video, the speaker connected to the motherboard gives me now beeps either.
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March 24, 2011 4:39:56 PM

I have contacted Biostar and they have said it seems that PSU is incompatible with the motherboard. I guess I will be calling Tigerdirect again to get a totally different PSU sent to me. I have found that there are many others who bought this kit that are having the same problem. Argh!
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March 24, 2011 6:03:27 PM

I just downloaded the tech .pdf for the Biostar N68S+ mobo. On page 6 is states the following:

"Note: Please update the BIOS to the latest version while using AM2+ CPUs. Due to the latest CPU
transition, you may encounter the situation that the new system failed to boot while using new
AM2+ CPUs. In this case, please install one standard AM2 CPU to boot your system, and
update the latest BIOS from our website for AM2+ CPUs support."

Since the AMD Phenom X4 is an AM2+ CPU, this may be our problem. Unfortunately I don't have a plain AM2 socket processor to try. Also can't update the bios without a processor :(  .


This is the list of supported processors:

# AMD Phenom™ II X4 Processor
# AMD Phenom™ II X3 Processor
# AMD Phenom™ II X2 Processor
# AMD Phenom™ X4 Processor
# AMD Phenom™ X3 Processor
# AMD Athlon™ II X4 Processor
# AMD Athlon™ II X3 Processor
# AMD Athlon™ II X2 Processor
# AMD Athlon™ X2 Dual-Core Processor
# AMD Athlon™ 64 X2 Dual-Core Processor
# AMD Athlon™ 64 Processor
# AMD Sempron™ Processor

Not sure which of these are AM2 gen cpu's. If anyone has access to one of these, please try it.

I am sceptical that this is a PSU issue.

George
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March 25, 2011 3:22:05 PM

It still seems to be the PSU issue and I have called Tigerdirect to let them know that the one in the kit is incompatible with the mobo and that many others are having this same issue. They are looking into one that will work with it and will send one out to me. So I will update when I get it and let you know if it works. I suggest anyone else whos having this problem call and ask for a replacement, it didn't cost anything extra.
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March 25, 2011 3:28:39 PM

I forgot to mention that Biostar support said it is not an incompatible chip issue:

The factory BIOS for N68S motherboards support AM3 CPUs.

If the CPU is incompatible, the system will stay powered (with no POST).

The problem is related to the power supply.



support@biostar-usa.com

626-581-1055 menu select 2
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March 26, 2011 3:32:27 PM

Ok I have the same kit and am having the same problem, sometimes it will post but turn off withing 3 minutes and mostly it just wont turn on, so is it the power supply or the cpu thats incompatible?
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March 26, 2011 4:13:31 PM

Just got off the phone with compusa and they are sending me a different brand power supply and said to toss the diablo tek in the trash.
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March 31, 2011 12:17:50 AM

Just got my new Ultra LS 350, 350 watt PSU from Tigerdirect after I traded in that other piece of junk and the machine runs like a dream. Thanks for all of your help and input I was going crazy when I first got it and it wasn't even coming on, who knew they didn't even test their own kits.

Thanks all,
Zach
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a c 90 B Homebuilt system
March 31, 2011 2:22:56 PM

Thanks for the update and letting us know what was up with that problem.
It's one of the stranger issues we've seen around here. Not unique, but it's been a while since something like that has turned up. Way to hang in there.
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