Post-build - PC doesn't boot up.

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AOS-

AOS-

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1 sentence summary: After putting the parts together, the build does not boot up.


Parts list:

Mobo: Asus H170i-Plus D3 Mini-ITX
PSU: Corsair CX600M 600W
RAM: Corsair XMS3 DDR3 1600Mhz (2x4GB)
Video: EVGA GTX 750Ti
HDD: WD Black 1TB 7200rpm
Case: Cooler Master Elite 130



Further details of the situation:

  • The moment I hit the power button, the fan and PSU fan twitch, like I got a shot of electricity and that was it. The power indicator LED on the mobo is lit though.
  • I had read my mobo might be grounding itself to the case, so I took it out of the case (note I unplugged the 4-pin ATX connector at this point while the 24-pin is still plugged in), unplugged all the unnecessary cables for testing (hd audio, USBs, video card, HDD), placed it on my wooden (cardboard) table, powered it on and voila; the psu and cpu fans are spinning! Powered it off.
  • Noticed the 4-pin ATX was unplugged at this point, so I plugged it back in and tried to reboot it while still on the table. The fans do not power up. The power LED is on though, so we seem to be back to square one.
  • Unplugged the CMOS battery for a few minutes and put it back in.
  • I'm unsure if this began after the fans started spinning, but whenever I flip the power switch on the PSU to ON, the power led indicator on the mobo will turn on before I even power on the build... not sure if this means anything.

I do have a 430W PSU I can try out to see if the PSU is the cause, but other than that I'm unsure what else to test to diagnose the problem.

I'm pretty sure the power switch plug on the case's front panel is put in the correct spot; recall I did get the fan spinning at one point.

What I'm unsure of is why it worked once on the table, and stopped working a second time.
 
Last edited:
20832
Do you have the motherboard standoffs installed?
Click to expand...

I do indeed. Whether or not they're touching the mobo in a weird way is something I don't know. :P

Joke aside, I am willing to consider grabbing plastic washers to increase the space between the mobo and the base of the case, because the Elite 130 sits the mobo on the bottom rather than holding it up vertically.
 
Update time:

Tried the paperclip thing on the PSU with the two chassis fans as a load. Thing powers on; no issues.

Hooked up the mobo to another PSU, with only the CPU fan. Thing powers on; thank goodness the mobo isn't faulty.

Hooked up the mobo back to my PSU, again with only the CPU fan. Thing powers on; YAY!

Assemble the mini tower, did not even unplug the Power SW plug; doesn't power up again.

:banghead:

should I slip a piece of plastic underneath the mobo to prevent any thing from grounding to the case other than the stand offs?
 
Check to see if your case has any extra standoffs in places where your mobo doesn't need them.

Also, logging into ARM every now and then might help as well. :lol:
 
So, wait, does it only work when the 4-pin ATX isn't connected, or did you connect that too when you tried the backup PSU?
 
Lain
Check to see if your case has any extra standoffs in places where your mobo doesn't need them.

Also, logging into ARM every now and then might help as well. :lol:
Click to expand...

A classmate also suggested it may be the stand offs, but seeing as how I've only been given 4 pieces for the 4 only holes available on the case, it does not seem to be the cause. My arm also isn't going to help either. :P

David
So, wait, does it only work when the 4-pin ATX isn't connected, or did you connect that too when you tried the backup PSU?
Click to expand...

Sounds weird, doesn't it? I didn't try leaving out the 4-pin on the backup PSU.



Update:

I eventually found out the cause of the PC not booting up and it was because of the chassis fan I plugged into the mobo. My PSU is modular so when I had it working, I didn't have the HDD nor fans plugged into the PSU, but when I did, it wouldn't start.

So through simple 1-on-1 testing, I had found out that if the chassis fan wasn't plugged into the PSU, the computer would start, but the chassis fans wouldn't spin. I tried unplugging the fans from the mobo and only plugging them into the PSU and we have lift off.

Really now, the mobo user guide specifically states I have two CHA FAN slots. Why they are causing the PSU to stop is a bit beyond me. I can get into the BIOS, but my only loss now is the inability to monitor or control the chassis fans. I hope that won't be a big issue.

zcjLHtCl.jpg







Anyway, I appreciate the help I've been given. Thank you very much, contributers. Off I go getting Windows set up.
 
Doesn't Corsair have a Win app to control fan via the PSU?? I think some of their models can do that, mesure power consumption....
 
Which plug are you putting into the chassis fan connector?

According to the manual you only have.

24pin ATX
8pin EPS12v
SATA
IDE/floppy power
PCIe

Nothing about fan control
 
The computer will not boot up if I plug in the chassis fans to those chassis slots as indicated in the manual.

I've left the fans disconnected from the mobo, but are still plugged into the PSU so the fans are functioning now, but I don't have any control of it.

I have not tested it with another fan. As long as the two chassis fans will spin, I think I'll be okay with what I have.
 
AOS-
Defect upon arrival or defect after plugging it in?
Click to expand...

Could be DOA.

If the fan prevents the PC from working when plugged in it is normally the actions of issue.

Plugging it into CHA_FAN would not cause the PC not to POST if it was good.
Slight chance the mainboard is faulty and just shuts down when any load is put on the fan power source.
When the PC is on the fan heads are powered with +12v(Red or yellow), RPM(Yellow or Green(if +12v is yellow)), GND(Black), PWM(Blue)(if 4 pin header)
 
AOS-
The computer will not boot up if I plug in the chassis fans to those chassis slots as indicated in the manual.

I've left the fans disconnected from the mobo, but are still plugged into the PSU so the fans are functioning now, but I don't have any control of it.

I have not tested it with another fan. As long as the two chassis fans will spin, I think I'll be okay with what I have.
Click to expand...
If I am reading this right, you were trying to plug the fans into both the mobo and the PSU at the same time? If so that is likely the issue.
 
Rallywagon
If I am reading this right, you were trying to plug the fans into both the mobo and the PSU at the same time? If so that is likely the issue.
Click to expand...

Yeah that's what I did. I thought this would have meant the PSU supplies the power to the fan while the mobo can control it. I'm guessing the 4-pin slot on the mobo is supposed to be a different cable?
 
Ahh, that would explain it then. Likely the PSU was kicking off detecting a short circuit. Checking your mobo manual should show you were your fan ports are. Plug that little 4 pin connector in there, and that is it. No need to plug into the PSU.
 

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