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Another New built PC won't boot thread..

Hi there, my parts are listed below.
My PC won't boot.

Stage 1. At first it turned on and all fans were spinning. The motherboard flashed red numbers on the little screen.

Stage 2. Reinserted Ram, CPU and CMOS. Now PC won't start at all..

Any ideas?

+ RAM : 2*4gb Corsair Vengeance 1600MHz $95
+ HDD : 3TB seagate barracuda 7200rpm $142
+ CPU : i5 4670k $275
+ GPU : AMD HD 7990 Gigabyte 6GB $899
+ SSD : Samsung 250GB 840 Evo $219
+ Mobo: ASRock Z87-EXTREME4 $199
+ PSU : Antec 850W Modular $189
+ CASE: CM Storm Trooper $189
+ COOL: H110 Water Cooler $159
+ IPS 27" 1440p ASUS PB278Q $625
+ Surge Protector $30
10 answers Last reply Best Answer
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  1. have you read through the Sticky's... you should breadboard the system to detemine a hardware issue

    start here - http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems
  2. dingo07 said:
    have you read through the Sticky's... you should breadboard the system to detemine a hardware issue

    start here - http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems


    I've tried all steps. Right now I have my video card and ram out. It's still not booting.

    I don't understand, it was booting before. I've checked all the connections and they'e fine.

    The only things I changed since when it worked is the CPU and the CMOS battery.
    Could one of those be the culprit?
    I've tried reinserting them and rebooting, still nothing.

    There's nothing else I can take off the motherboard to test.. Maybe disconnect hdd/ssd?
  3. Best answer
    Check the red numbers, did they correspond with any debug codes? my asus board just had red led lights in certain areas that would go off if that portion wasnt working correctly. I don't know exactly what debug scheme that board has but check it with your manual/online to see what, if anything that it is getting angry at.
    And just to be clear; the fans were spinning the first time, however, you werent able to get into the bios? Or did you manage that first time?
    And now, nothing spins up at all? No fans or anything?

    If it's the first, I would tell you to check your connections. First time I booted up I had a black screen, (well, first time was a real issue but that resolved itself the next time i booted). It turns out the screen cable was not jammed all the way in and so the signal was not going through. When I finally did boot up only 1 ram stick was detected, turns out that the other one was not in all the way. So moral of the story, make sure everything is jammed all the way in (although don't snap anything of course). Since you said you took out the cmos battery, check to make sure that's in correctly

    If it's the second, then maybe a power issue? Does your board have any sort of led indicating whether it's getting power or not? Mine had this green light that turned on when it detected a connection to the psu, does yours have anything like that? Maybe you knocked out a connection somewhere when reattaching?

    Do you notice any scratches anywhere? Any weird smells or sounds from when you first started up? Could you test with another psu? Is your surge protector working correctly (/ did you accidentially turn it off?)? Is the psu switch in the on position?

    You could try disconnecting the hard drives, although i don't see why this would change much as they arent needed to boot, if there was an error they probably just wouldnt show up in the bios
  4. im guessing you might not have the cpu installed correctly or you possibly have a bent pin on the cpu socket - I would suggest you take it out and inspect the connector thoroughly with a magnifying glass if you can't see that well, the slightest tweak of one of those pins can cause all sorts of issues
  5. Thanks for your help. Turned out The reason nothing was turning on was because when I took out the CMOS battery, I had to wait 15+ minutes until it worked again.

    And the display wasn't working because there was something wrong with the mini displayport, and it worked with DVI-D.

    My only issue now is that when the computer turns on, the Graphics Card (HD 7990), it's fans stop for 2 seconds, then start again.
    Is that an issue? Will this cause problems down the line?

    Thanks for helps
  6. sounds like you have a bum motherboard - unless you physically broke the mini dp connector by hitting it somehow
  7. is it just once when booting up? or does it constantly do it?
  8. mc962 said:
    is it just once when booting up? or does it constantly do it?


    It's just once while booting up, but it's not a big deal. Everything else works fine.
    Overclocking was too hard, so I left it on 4.6 GHZ at 1.3 volts and RAM at 1600mhz.
    Should that be fine? or should I aim higher?
    My windows experience Index shows 8.2 for all categories. Is that good?
    Or should I OC more
  9. some people like to aim for the stars, i'm of the opinion that you don't really need to go so far if you don't need it unless you are trying to get some benchmark high score or something

    If it does what you need it to do in acceptable times without causing problems I don't really see the need for more; maybe see how high you can go before issues appear, but that would probably be more for curiosity's sake
  10. atinder1 said:
    It's just once while booting up, but it's not a big deal. Everything else works fine.
    Overclocking was too hard, so I left it on 4.6 GHZ at 1.3 volts and RAM at 1600mhz.
    Should that be fine? or should I aim higher?
    My windows experience Index shows 8.2 for all categories. Is that good?
    Or should I OC more


    Had u mentioned the OC in your first post, we wouldn't have wasted our time trying to diagnose a hw issue
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