Damaged CPU, is Mobo dead?

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Dieselakoc

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Hello I buyed a new Mobo yesterday. I checked it and its all fine, no damage on Mobo. I installed the CPU and I had no display, so I removed and reput cpu a lot of times(also changed thermal paste 2-3 times). After so many times. when i turned on my pc again, I heard a buzzing noise from psu. I tried 2 times in a row and still the same. Then no boot just CPU Cooler fan spinning. I installed a new psu and still the same. I saw under cpu that it had a scratch-like thing on the one corner. I removed it immediately. The socket pins are all fine on motherboard, no sign of damage but is it possible that my brand new mobo is dead!? :ouch:
 
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Barty1884

Barty1884

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The i3-4150 needs BIOS revision 0703 to work. It's possible you have an older BIOS revision on there?

This is a new, retail board? Is there anything noted on the box re: date of manufacture?
0304 was the first release BIOS (Aug 2013) with 0401, 0504, 0601 released through Dec 2013. None of which support that CPU.
Jan 24, 2014 the 0703 BIOS revision launched.... so I'd expect boards manufactured a couple of days/weeks prior (as Mfg will have access to the BIOS before public release) or after that date, to have an appropriate BIOS installed.
 
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Dieselakoc

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I have the same motherboard with the same cpu on another PC and it works fine.
But I applied the thermal paste on this PC so I may have done something wrong, so I think my cpu is apsolutely dead. The one tha I fear the most is if cpu damaged the new mobo(no damage seems to be on socket pins though)
 
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Dieselakoc

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I dont want to risk another used cpu on this motherboard. Im going to buy a new one. But the thing is do I need to buy a new mobo also? And my biggest worry. If I put the new cpu on this socket (which doesnt seem damaged), will the new cpu be in a risk to get damaged by a "dead" motherboard? Also can a PSU burn my motherboard?
 
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Barty1884

Barty1884

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You don't want to "risk" the other CPU, but you're prepared to buy a new motherboard?

I would test with the hardware you have - As I pointed out, you may well have an older BIOS installed.

Theoretically, the motherboard you have could be fine. Either the CPU is damaged, or the BIOS needs to be updated.
Using the other CPU you have, will give you more of an idea before you run out and buy a new motherboard.

While it's entirely possible the motherboard is damaging a CPU, it's equally possible the CPU is damaging the motherboard (also possible that nothing is damaged at all).

Better to test with the hardware you have on hand IMO, then, if something is damaged; replace it.
 
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Dieselakoc

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My cpu seems damaged underneath (it seems like scratch), so if I put this cpu on another motherboard the chances that the cpu will damage the mobo's socket are high and i dont want to risk it. In conclusion, Im pretty sure that the cpu I already have will damage a brand new mobo because it seems damaged, but Im not sure if the mobo I already have, which doesnt seems damaged at all, will damage a brand new cpu if its dead after all.

 
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Dieselakoc

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Oh Im relieved then from the cpu side, I hope my PSU didnt burn my mobo. I have read that the spinning fan from the cpu cooler and no other power sign its usually a fact that mobo is dead or rarely that the cpu is burnt (I hope thats the case). I know you cant be sure about my mobo's problem but supposely that my psu killed the mobo, will it be risky to install a new cpu on it?(I will also buy a new psu along with cpu, because the one I have is garbage)

Im really sorry that Im such a noob and I thank you for your help and your effort.
Im asking so much because its not really my PC, its my friend's and I dont want him to spend more money than he should.

 
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Barty1884

Barty1884

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What PSU? *IF* your PSU fried the motherboard (and CPU), it *may* continue to do so. Impossible to say without more info.

Assuming the PSU is somewhat decent quality, it probably didn't fry the board (nor CPU).

Spinning CPU coolers with no other sign of life is in no way a "fact" that the motherboard is dead, or CPU damage.
 
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Dieselakoc

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I'll buy a new corsair vs 550w psu (the one I use in two pc for 3 years). Sorry I dont remember the model of the old psu installed in that pc but Im sure its something very crappy.

So what is your opinion about the spinning coolers? A faulty ram?

Thats a picture of my old cpu. Is it burnt? If you look closely on top right side you'll notice something dark/black on the pins. There is also some on bottom left side but its not as much as on the top.
2d8km1g.jpg

 
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Barty1884

Barty1884

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The VS550 isn't a great PSU itself.... so I'd suggest avoiding that. There have to be better options available to you.

As requested previously, please post your FULL (detailed) system spec. Then we'll have some idea of what we're working with.

As for my opinion, without knowing the rest of the spec.. it's impossible to say.
My best guess, as of right now anyway... would be bent pins in the CPU socket.

Other options would include a bricked BIOS, defective RAM module etc etc. The list can be quite long.

Nothing about that image would suggest the CPU is burnt.... but sometimes there's no physical indication of that (and sometimes it's blatantly obvious).


Ultimately, as I've suggested from the start - I'd try out the CPU in another rig, and the other CPU in this one.
BUT, if you just want to replace everything (which seems to be the way you're leaning), you could put yourself on a modern platform (i3-8100, Ryzen3 or Ryzen5 etc) for likely similar money than buying an H81 motherboard retail in 2018.
 
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Dieselakoc

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Sorry I made a mistake about the position of the black spot on cpu (its top left) but if you say its fine then Im very happy about it.

Hmm so vs550 isnt good, but what can I buy for the same price. I have this psu on two pcs and I had no problem so far.
I know the best I can do is to build the pc again, but that would be very painfull for my friend because except mobo, psu and cpu he has to buy a new ram too thats why I avoid to replace the mobo. I've seen a trick on youtube for the ram(the one with the eraser), Im gonna try it soon and then I'll see if a new ram is needed. I've seen over and over again the socket and I cant spot any bent pin. I pushed a bit cpu on the socket a moment when I applied thermal paste with a card (I didnt use the middle ball method) but still I cant spot a single bent pin, or I bented them all :D i dont really know. When I'll check for the ram I will put this cpu in the socket I hope it wont damage it.
 
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Dieselakoc

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UPDATE: Sorry for ressurecting the post but I cleared bios and cleaned the ram with an eraser, I've put a new psu but still the same cpu.

Now the PC at least can turn on but I have no display and I dont think its the gpu as none of the leds work (keyboard or mouse)
Can the cpu block the motherboard from booting because as I stated in other posts above the cpu seems quite damaged? Or is it the motherboard after all...?
 
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