New CPU Cooler - No POST

Hi guys, long-time reader, first time poster -

I built myself a custom computer about a year ago, and everything's worked fine up until today. My stock CPU cooler for my i3-2100 was always a bit loud so I ponied up and bought a replacement for it - a Cooler Master Hyper 212 Plus.

I also orded an anti-static wristband, and made sure to read up on how to properly remove thermal paste, reinstall it, and how to install the specific heatsink.

So... all is well, the installation is a breeze, I'm grounded the entire time, put everything back in the computer, go to power it on, and... nothing. Absolutely nothing; no fans are spinning, no familiar 'beep', just absolutely nothing. The Power LED on the Motherboard IS working (and lit up), but pressing the power button yields absolutely nothing.

So I checked the connections from the PSU to the motherboard, video card, HDDs, etc. and everything is just as it was - everything's plugged in fine. I checked the motherboard, there's nothing (visible) to indicate that it might have shorted.

Is there anything else I should be looking at/testing/doing? I'm sort of at a loss as to what could cause nothing to work.

CPU: Intel Core i3-2100 @3.1GHz
PSU: Rosewill 630W 80+ Bronze
GPU: Asus GTX550 Ti
Mobo: Asus P8H61 LE/CSM
Case: Antec Sonata III
RAM: 8Gb (2x4Gb) G.Skill Sniper @1333MHz
Cooler: Cooler Master Hyper 212 Plus
HDD: Seagate AS Series 1TB
6 answers Last reply
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  1. Sounds strange, you made sure the CPU cooler fan was plugged into the cpu fan header? Also, Rosewill PSU's are not well regarded but I do not know what you could have mucked up simply changing the heatsink with regards to the PSU, you could take the cooler off and check your CPU pins for damage.
  2. Check you haven't knocked the connection for the power button...
  3. How about the ATX 4 pin 12V Power Connector Pinout? It is placed near the area you had worked on to install the Hyper -- just make sure it is plugged correctly.
  4. Yep! The CPU Cooler's fan is plugged into the 4-pin CPU_FAN1 slot, just as the stock cooler was. Case fans are plugged into their respective spots as well.

    Connection for the power button seems fine - the pins on the bottom of the motherboard are fine and connected properly as well (just read the motherboard manual to make sure).

    The ATX 4pin 12V connector is fitted as well. I made sure to put that one in because when I initially set up the computer (about a year ago) I left that out - I try not to make the same mistake twice! ;)

    Also as far as the PSU goes, it got a HardwareSecrets gold award, so I picked it up on the suggestion of both them and of Newegg. I'll look into getting that replaced if Rosewill isn't as reliable.

    I'll try pulling everything out again and see if I can't get to the bottom of this...
  5. two things...when you pulled the heat sink off it may have pulled the cpu off the mb pins. try reseating the cpu..the other thing to check is the back plate. if it metal is may be shorting out the back of the mb. some heat sink have a foam pad that needs to be in the middle of the mb and back plate.
  6. I'll definitely check that. I'll post pictures when I've got it all taken apart again.
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