New PC build won't post, red CPU led lit, Fans work, GPU logo lit, everything plugged in

Hello awesome people,

I recently completed my gaming PC and nothing shows up on the display. All the fans turn and the SapphireR9 280x logo is on so I think its getting power. The hard drive vibrated a little bit so I know it's working. The CD drive also opens and closes. That leaves the motherboard, processor and ram.

I switched the ram around and tryed bottling with one ram stick(g skill sniper).

I think the ram is fine.

However the red post CPU led is on indicating that there is something up with the CPU. (Amd fx-8350)
But that rarely happens.

So it may just be that tiny metal pins on the back side of the mobo processing area. I got a bit of thermal paste on that( near the back plate).

I later cleaned it off with iso alcohol.


Another thing is that the cooler (cool master 212 evo) may not have been installed right. It semmed a not lose at first. I redid the installation after finding the no post problem.

One last noon thing I may have done is put one too much thermal paste.

So what do you guys think.

Did the processor burn up due to too much thermal paste and a bad cooler installation...Even with its safe guards.

Or is some tiny fragment on thermal paste still left on some mobo pin and causing the processor to nor conect with the motherboard.


Here's something a I've done.
1. Rearange ram
2. Checked for bent processor pins
3. Made sure everything's plugged in
4. Made sure GPU and ram is pushed in right.
5. Mad sure cooler is installed right and plugged in.
6. Placed GPU in different slots.
7. Used 3 different monitors.
8. I also reset the CMOS by taking out te battery and by using the switch thing.

I sincerely wish you guys help. I don't want to replace both the motheboard and processor. This was a 1,200$ build and I can't really afford new parts.
7 answers Last reply
More about build post red cpu led lit fans work gpu logo lit plugged
  1. full spec?
  2. Dude, make sure the mboard is totally flat and all reverse solder pins never touch the backplate. Never tighten the mboard screws too tight either.

    Check your mboard manual for troubleshooting error codes/lights.

    Chuck your os cd in the drive, press your bios key, usually 'del', order boot to cd first, save and restart.
  3. rgd1101 said:
    full spec?


    Rich_hard1 said:
    Dude, make sure the mboard is totally flat and all reverse solder pins never touch the backplate. Never tighten the mboard screws too tight either.

    Check your mboard manual for troubleshooting error codes/lights.

    Chuck your os cd in the drive, press your bios key, usually 'del', order boot to cd first, save and restart.




    When I press Del nothing shows up on the screen. Also I made sure nothing is touching the case and all skrews and good. I don't know if I over tightened but I don't it:( When I try to press del on boot nothing shows up. The screen remains blank.
  4. rgd1101 said:
    full spec?


    AMD FX-8350 4.0ghz
    Asus m5a990 FX PRO R 2.0
    Sapphire Readeon R9 280X
    CM 212 Evo
    G Skill Sniper 8gb
    PNY XLR8 120GB SSD
    WD 750GB HDD
    Corsiar TX 650W 80+ BRONZE

    I used Article Silver 5 as thermal paste

    I think that's all:)
  5. ==-
    If the red CPU light is on, then the CPU is damaged, period.

    If it's brand new, return it RMA. But run a 9V battery across the pins to make sure they don't sell it to someone else as "refurbished."

    -faye
  6. Rich_hard1 said:
    Dude, make sure the mboard is totally flat and all reverse solder pins never touch the backplate. Never tighten the mboard screws too tight either.

    Check your mboard manual for troubleshooting error codes/lights.

    Chuck your os cd in the drive, press your bios key, usually 'del', order boot to cd first, save and restart.




    Sadly it wont do anything when I hit DEL. I looked for error codes but my mobo doesn't have a speaker so I ordered one. The main thing I see id the Red Led for the CPU. It doesnt make sence. I read many forums and the CPU usually doesnt go bad.
  7. faye__kane said:
    ==-
    If the red CPU light is on, then the CPU is damaged, period.

    If it's brand new, return it RMA. But run a 9V battery across the pins to make sure they don't sell it to someone else as "refurbished."


    I'm going order one of those cheap semperon procesors that work with AM3+ boards and see if it really is the processor. I would really like to know how exactly do you do the 9v battery thing. What does that do. Does it make it unusable or test it to see if it works???
    -faye
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