The Corsair User Forums  

Go Back   The Corsair User Forums > Corsair Product Discussion > Power Supplies

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
  #1  
Old 01-04-2013, 09:08 PM
rhinosneros rhinosneros is offline
Registered User
rhinosneros's PC Specs
 
Join Date: Jan 2013
Posts: 12
POST ID # = 623563
rhinosneros Reputation: 10
Default New build won't power up.

I just assembled a new box ... but it fails to power up. CPU and case fans function, but the hard drive doesn't power-up/spin and I can't even eject the DVD-RW drive door.

I'm using a new TX850M power supply. How should I reasonably proceed with troubleshooting? I provided all personal hardware details when I registered for the forum, but I'm not sure that others can see them. I can re-specify if needed. Thanks in advance for any quality input.

In the way of background, my original computer was an IBM PC ... no hard disk drive, but with four 5¼" (full height) floppy disk drives (purchased from Computerland, in the winter of 1981). Since then (and over the 17 years immediately following) I've assembled hundreds of units professionally, including 386, 486, then Pentium CPU CAD workstations — but nothing within these last fifteen years.

Last edited by rhinosneros; 01-05-2013 at 11:16 AM.
Reply With Quote


  #2  
Old 01-05-2013, 10:51 AM
peanutz94's Avatar
peanutz94 peanutz94 is offline
Support Assistant
peanutz94's PC Specs
 
Join Date: Feb 2011
Location: Akron,Ohio
Posts: 9,740
POST ID # = 623667
peanutz94 Reputation: 84
Default

That sounds more like a dead MB than anything. If the PSU wasn't powering up none of your fans would be on.

I would double check all your connections,especially the EPS connector that powers the CPU.

Are you getting any error beeps from the MB?
Reply With Quote


  #3  
Old 01-05-2013, 11:30 AM
rhinosneros rhinosneros is offline
Registered User
rhinosneros's PC Specs
 
Join Date: Jan 2013
Posts: 12
POST ID # = 623683
rhinosneros Reputation: 10
Default

Thanks for our reply.

No error beeps from the motherboard.
(I've joined an ASRock support forum and initiated a support thread for this problem.)

The 24-pin connector that provides power to the motherboard feels and looks firmly seated. I find it particularly interesting that there is power for the fans, but yet my 2TB hard disk doesn't spin.
Reply With Quote


  #4  
Old 01-05-2013, 05:54 PM
rhinosneros rhinosneros is offline
Registered User
rhinosneros's PC Specs
 
Join Date: Jan 2013
Posts: 12
POST ID # = 623742
rhinosneros Reputation: 10
Default

You referenced the "EPS connector that powers the CPU." That's new to me — in the past there was no psupply connector for specifically powering the CPU. Attempting to identify the proper psupply connector and pin-set on the mboard,
  • The power supply has an 8-pin cable (2x4) whose connector is labeled CPU.
  • The Corsair website Tech Specs references the 8-pin connector as EPS. No CPU tag reference is made.
  • There is no User Manual (PDF) for the TX850M power supply on the Corsair website (that I can find). There is one for the TX850 V2, however. That manual references an 8-pin cable+connector as EPS12V CPU Cable (8-pin).
  • The ASRock motherboard has an 8-pin connector referenced in the user manual as ATX 12V Power Connector (ATX12V1).
The seemingly inconsistent labeling is confusing. Are these all varied tags all referencing the same connection that I must make to correct the nonfunctioning system? I certainly don't want to make a power assignment error here. Thanks for clarifying.

Last edited by rhinosneros; 01-05-2013 at 06:15 PM.
Reply With Quote


  #5  
Old 01-05-2013, 06:18 PM
jlhawn's Avatar
jlhawn jlhawn is offline
Registered User
jlhawn's PC Specs
 
Join Date: Nov 2011
Posts: 330
POST ID # = 623747
jlhawn Reputation: 30
Default

next too your cpu is a 8 pin socket some have a cover over 4 of them, you have an i7 therefore you remove the cover and insert the 8 pin cpu power from the power supply, and the EPS is for the cpu some just say cpu on them and some say EPS
Reply With Quote


  #6  
Old 01-05-2013, 06:50 PM
rhinosneros rhinosneros is offline
Registered User
rhinosneros's PC Specs
 
Join Date: Jan 2013
Posts: 12
POST ID # = 623750
rhinosneros Reputation: 10
Default

Thanks so much for your helpful and timely reply, jhawn.
Reply With Quote


  #7  
Old 01-05-2013, 07:18 PM
rhinosneros rhinosneros is offline
Registered User
rhinosneros's PC Specs
 
Join Date: Jan 2013
Posts: 12
POST ID # = 623753
rhinosneros Reputation: 10
Default

The 8-pin connector snapped in place like a glove. After 1) plugging the power cord into the TX850M power supply, 2) turning the psupply ON using its rocker switch, then 3) pressing the case power button ... nothing different happened. I double checked to make sure that the power switch was properly connected to the motherboard.

Hints?
Ideas?
Reply With Quote


  #8  
Old 01-05-2013, 10:20 PM
jlhawn's Avatar
jlhawn jlhawn is offline
Registered User
jlhawn's PC Specs
 
Join Date: Nov 2011
Posts: 330
POST ID # = 623777
jlhawn Reputation: 30
Default

just for my own reference you do have the dvd drive and hard drive connected with the sata power cables from the psu yes? cause if the cpu fan is coming on and all the other fans then the problem must be in the hard drive and dvd drive. will it boot up too let you see the motherboard bios? the bios will come up even with out a hard drive but if you can get too the bios it will show you if it detected the hard drive and dvd then you will know for sure if they are either bad or not connected somehow. both units need a power cable from the psu and a cable from the motherboard
Reply With Quote


  #9  
Old 01-06-2013, 07:35 AM
peanutz94's Avatar
peanutz94 peanutz94 is offline
Support Assistant
peanutz94's PC Specs
 
Join Date: Feb 2011
Location: Akron,Ohio
Posts: 9,740
POST ID # = 623829
peanutz94 Reputation: 84
Default

Quote:
just for my own reference you do have the dvd drive and hard drive connected with the sata power cables from the psu yes? cause if the cpu fan is coming on and all the other fans then the problem
I have to disagree with this. If the CPU fan is spinning and it's still not posting, I'm betting on a DOA MB. It's either that or the CPU. I'm not ruling out a bad HDD, just dont think that is the issue.

But just for further testing purposes, i would remove all the memory except for one stick in the first slot and see if it will POST then. If not I would contact ASrock and ask them about this, but i dont see any issues with the PSU or HDD.

The other thing you could try is to see if there is a BIOS update for the board ad update it if necessary. But that you would at least need to get into the BIOS to see what version you have

Also try starting the machine using the on board power switch on the MB instead of the case button.

Quote:
The power supply has an 8-pin cable (2x4) whose connector is labeled CPU.
The Corsair website Tech Specs references the 8-pin connector as EPS. No CPU tag reference is made.
They are one and the same. And the ATX 12v would be for a dedicated video card.

Does your MB have a speaker? Does it give you any sort of error beeps when attempting to start. That would really help. The beeps would at least point you in the direction of the failing parts.
Reply With Quote


  #10  
Old 01-06-2013, 07:25 PM
jlhawn's Avatar
jlhawn jlhawn is offline
Registered User
jlhawn's PC Specs
 
Join Date: Nov 2011
Posts: 330
POST ID # = 623953
jlhawn Reputation: 30
Default

this is why i also asked the op if it will post the bios screen so he can see if it shows the drives as he has yet too say if the bios is up, reason i thought maybe bad hdd or not plugged into psu is the op said the drive is not spinning and with a bad motherboard the drive will still spin if it has power.
Reply With Quote


  #11  
Old 01-06-2013, 10:06 PM
rhinosneros rhinosneros is offline
Registered User
rhinosneros's PC Specs
 
Join Date: Jan 2013
Posts: 12
POST ID # = 624010
rhinosneros Reputation: 10
Default

Quote:
Originally Posted by jlhawn View Post
just for my own reference you do have the dvd drive and hard drive connected with the sata power cables from the psu?
Yes ... powered directly by the TX850M power supply connectors.
Reply With Quote


  #12  
Old 01-06-2013, 10:33 PM
rhinosneros rhinosneros is offline
Registered User
rhinosneros's PC Specs
 
Join Date: Jan 2013
Posts: 12
POST ID # = 624015
rhinosneros Reputation: 10
Default

I've edited this post, removing the bulk of it's former content. I'll add a post later this morning after I test all new components individually using a borrowed computer.

Thanks for your continued willingness to help troubleshoot.

Last edited by rhinosneros; 01-07-2013 at 09:17 AM.
Reply With Quote


  #13  
Old 01-08-2013, 07:24 PM
rhinosneros rhinosneros is offline
Registered User
rhinosneros's PC Specs
 
Join Date: Jan 2013
Posts: 12
POST ID # = 624698
rhinosneros Reputation: 10
Default

I pulled the new components from the Bitfenix Merc Case, then did some logical testing. In cases 1 and 3 drives were properly connected to the power supply. In all cases the motherboard was properly hooked-up to the 24 or 20-pin ATX psupply connector and the 8 or 4-pin CPU-pwr psupply connector.

Test 1
new: AS Rock mboard w/CPU and single memory module
new: Corsair TX850M power supply
new: Seagate 2TB hard disk drive
new: Samsung 22x SATA DVD-RW drive
used: LG E2350V display
  • No POST
  • HD doesn't spin
  • Power supply fan doesn't spin
  • No beeps (speaker plugged into motherboard)
  • CPU fan functions
  • No image on monitor

Test 2
used: NMB power supply from functioning Sony VAIO
new: AS Rock mboard w/CPU and single memory module
used: LG E2350V display
  • No POST
  • No beeps (speaker plugged into motherboard)
  • CPU fan functions
  • No image on monitor
I then reinstalled the NMB power supply back into the Sony VAIO ... and it booted up with no issues.

Test 3
used: functioning Gateway computer
new: Seagate 2TB hard disk drive
new: Samsung 22x SATA DVD-RW drive
used: LG E2350V display
  • Boots without problem
  • HD spins great
  • DVD drive recognizes power and drawer ejects just fine

In view of the fact that I've never experienced a bad Intel CPU (in hundreds of new-builds), I suspect that both the motherboard AND the power supply are toast.

What do you think?

Last edited by rhinosneros; 01-09-2013 at 06:41 PM.
Reply With Quote


  #14  
Old 01-08-2013, 09:57 PM
peanutz94's Avatar
peanutz94 peanutz94 is offline
Support Assistant
peanutz94's PC Specs
 
Join Date: Feb 2011
Location: Akron,Ohio
Posts: 9,740
POST ID # = 624735
peanutz94 Reputation: 84
Default

I really think it's just the MB. the only thing to fail in tests 1&2 are just the MB. Two different PSu and the same results.
Reply With Quote


  #15  
Old 01-08-2013, 10:04 PM
rhinosneros rhinosneros is offline
Registered User
rhinosneros's PC Specs
 
Join Date: Jan 2013
Posts: 12
POST ID # = 624738
rhinosneros Reputation: 10
Default

Thanks peanutz94.

Note, however, that whenever the new Corsair TX850M power supply is employed, the hard disk drive AND the DVD drive fail to respond.
Reply With Quote


Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 12:14 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.