PC starts but shuts down immediately

Datanome · Jul 3, 2014

Recently I built my first computer.
It has very well for 1-2weeks until now.

My water cooler wasn't cooling anymore so I took it off, cleaned the CPU and heatsink and put new thermal paste.

When I put the cooler back I forgot to pull the CPU's lever down to secure it, and when I took it off it was attached to the cooler.
When I detached it, it dropped from about 5-10cm to mono.
I also accidentally grabbed it from the bottom with two fingers (gently), but couldn't see any damage.

Now that I secured the CPU and put the cooler back, my computer didn't start anymore.
It spins the case fans for about 1 round and shows some lights but after ~1s it stops immediately.

Help me?
I hope my CPU's not dead.

List of parts:
i7-4770k
Gigabyte GeForce GTX 780 TI OC
16GB (2x8) Crucial Ballistix Sport
MSI Gaming 3 Z97 (don't remember the real name)
3 TB WD Black
260GB Samsung SSD
Corsair H100i

MostWantedSoulRider · Jul 3, 2014

I don't understand the question, OP. The title says that your PC starts at first place but when I read the complete thread, it says your computer don't even start.

Was your computer working before applying the paste?

Datanome · Jul 3, 2014

Sorry, edited it now.
I'm new to here and the mobile site is very complex.

Datanome · Jul 3, 2014

In case you still didn't understand, the computer has worked well for a week or two.
Now the computer stars but after a second it shuts down.

Cristi72 · Jul 3, 2014

Hello,

Did you drop the CPU directly on the motherboard's socket or on the other area of the motherboard? Because if you dropped onto the socket, it is a good chance to have some bent pins.

Datanome · Jul 3, 2014

Christi:
I don't think I dropped it into the socket, no.

seogoat · Jul 3, 2014

Re seat processor again. Try with 1 stick of ram. Try and reset cmos. Make sure all cables are connected properly.

Datanome · Jul 3, 2014

seogoat :

Re-apply thermal paste?
Could it be if the heatsink touches the cpu without thermal paste, because in the corners it didn't apply too well?

seogoat · Jul 3, 2014

Try it that after reseating processor. If paste's in the socket, pins or board circuit, wipe it off.

Datanome · Jul 4, 2014

seogoat :

Still no...
Could it be because of a faulty PSU?
Or have I broke my CPU?

Cristi72 · Jul 4, 2014

Datanome :

Did you check if the CPU lever is OK? Maybe you bent it when you put the cooler head back and now it has not enough force to push the CPU onto the socket.

Datanome · Jul 4, 2014

Cristi72 :

I think it is fine, at least you had to use some force to get it down, and the cpu didn't move a bit in there.

Cristi72 · Jul 4, 2014

Datanome :

Take out the CPU, leave the CPU socket open (just make sure the lever isn't touching anything) and power up the system. If the system stays ON, then the problem is either the CPU, or some pins in the socket which shorts when the CPU presses on them. If the system immediately powers OFF as before, the mobo is damaged (assuming that no pins from the socket are touching).

EDIT: please also verify the back of the CPU for missing components (it has a few dozens capacitors and some resistors)

Datanome · Jul 6, 2014

Cristi72 :

Datanome :

Take out the CPU, leave the CPU socket open (just make sure the lever isn't touching anything) and power up the system. If the system stays ON, then the problem is either the CPU, or some pins in the socket which shorts when the CPU presses on them. If the system immediately powers OFF as before, the mobo is damaged (assuming that no pins from the socket are touching).

EDIT: please also verify the back of the CPU for missing components (it has a few dozens capacitors and some resistors)

Okay, so it actually turned on without the CPU...
I hope my CPU's not dead, can't really afford a new one.

How could I be sure about this?

Cristi72 · Jul 6, 2014

The best and only way is to test the CPU by using another motherboard. If you don't have a friend using the same 1150 platform, buy the least expensive motherboard and try the CPU:

http://www.newegg.com/Product/Product.aspx?Item=N82E16813157483

But please do not try any overclock on that, unless you want to see some fireworks!

Rhacked · Jul 28, 2015

Cristi72 :

Hey! I'm having the same issue and just tried this. Ran the system without the CPU and it stayed on. Is my CPU dead then? Can't really get a good view of the sockets on the mobo to see if anything is bent.

Chayan4400 · Jul 28, 2015

Rhacked :

Please don't revive threads that are over a month old, no one will reply, and you will better off starting a new thread so we can better answer your questions.

PC starts but shuts down immediately

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