Question Cant boot new motherboard, tested new parts, but it won't start.. Please advice

[elthztek]

Hi there,

I'm having some bad problems here and I really need some advice, I'm pulling my hair out over this. If you have any advice please post a reply.

First, my PC was working great, then it turned off one day, I unplugged the cable and plugged it back and heard a shock it didn't sound good. My first feeling was that the PSU was broken so I ordered a new PSU anyway. I performed the paper clip on this PSU so I knew it wasn't DOA it didn't work on the motherboard though.

I came to the sound conclusion that it had blown my motherboard, so I ordered a new motherboard from the amazon (accordingly used with minor box damage) it arrived and I set up as normal (CPU & RAM) and tried to boot again but alas it would not.

So I have three options on what happened

• The first shock actually fired not just my motherboard but the CPU and other parts also.
• The board that arrived is DOA and that's why it won't boot
• The CPU has been damaged but it may have also damaged this new motherboard too.,.

I note that I still get through power with the ETHERNET led on the motherboard [same on old mobo] when power is connected through the motherboard. There have never been any motherboard lights, or have I managed to POST on any of the boards yet.. All parts are validated as working on the same build also.

* I notice that on my previous motherboard there looks to be some brown almost discoloring on the CPU pin ports. Is my CPU faulty?

 

[gondo]

What happens with cpu fan and lights when you hit the power button?

 

[elthztek]

What happens with cpu fan and lights when you hit the power button?

nothing this is the 3rd motherboard now, tested. Paper clipped test psu... No lights.. i seriously cant even get get new hard ware to work.. what is wrong?
🙁

 

[elthztek]

There ya go... never can be sure of what you get with used. So yeah, it's totally possible two in a row are DOA.

I got a brand new different brand motherboard, tested with PSU and still no lights... What is wrong 🙁 Is my Psu Just not emitting the correct power, but still ok with the paperclip test? This could explain why all the boards were not giving power.. mmm

 

[drea.drechsler]

....
Is my Psu Just not emitting the correct power, but still ok with the paperclip test?
....

Yes, that is possible...although I'd expect at least an attempt to power up since it 'passed' the paper clip. That is, fans would pulse and lights light briefly then turn off.

take everything out...no cpu, no memory, no GPU. Just motherboard and PSU and try to turn it on. If it powers up but 'beeps' or flashes it's trouble LED's and stops that's what you're looking for. Then add the CPU...it should fail at memory and GPU. Add the memory..fail at GPU. Then add GPU. Where it stops is where the problem probably is.

Of course, it should be out of the case to do all this, with the case front panel wires still connected. If it won't power up, outside the case, with nothing in it,then the PSU would be suspect...or a defective component (cpu/memory/gpu) might have damage the motherboard.

 

[elthztek]

There ya go... never can be sure of what you get with used. So yeah, it's totally possible two in a row are DOA.

new motherboard bread boarded, with new PSU and still no lights. Can a psu not be giving enough power maybe... even if its paperclipped tested

 

[rgd1101]

what new psu did you get?

 

[elthztek]

Hi,

I've been trying to debug hardware issues for weeks now, Ive got through three motherboards all of which I assumed were DOA. The last I received I tested fully without no components, and with. brand new PSU (paper clip tested) I feel I am only left with the current broken PSU.

So,

Can a paper clip test [working] PSU still not power a motherboard if its faulty? I assume as some people do a use voltage test?

Currently using a CIT 550 w PSU/

 

[elthztek]

what new psu did you get?

I still using the same replacement I got, a CIT 550 watt. It was brand new, I paper clip tested it, but I don't think its powering any boards I give it...

 

[rgd1101]

paper clip test on test if the psu is dead. doesn't test anything else

 

[elthztek]

paper clip test on test if the psu is dead. doesn't test anything else

I have as I said, this PSu PAPER clip tested works however on two boards, brand new out of the box. They would never get power, so I suspect that even though it may be paper test cliped tested as working it is not emitting enough power to power the board.

 

[elthztek]

also a brand new MSI b450m max pro 2 board. - This has the EZ DEBUG LED lights on it, and I still cant get any default power lights regardless... The psu is working but its not powering the board.

 

[R_1]

sure can.
the only thing that the paperclip test test for is can the power supply power ITSELF.
that's it.
so a PSU may have the wattage to power itself and nothing more.
the only real way to answer is to try the PSU on another machine or another PSU in your machine

 

[rgd1101]

multiple motherboard but can't test with a different psu?

 

[USAFRet]

Sure.
Its like turning the key on in your car.
The dashboard lights come on, great...that says nothing about the functionality of the engine and transmission.

 

[elthztek]

multiple motherboard but can't test with a different psu?

HI sorry
OP, I posted that

I had a PSU working and it broke my board, so I purchased a brand new PSU and a new mobo, tested and it didn't work. Tried another mobo it didn't work. Purchased a 3rd mobo and it also wont power. I have purchased a new psu, and will return this one.

However it doesn't explain why a paper clip tested PSU isn't powering my board's=..

 

[elthztek]

well ordered Corsair 550, will find out tomorrow.

 

[yeung107]

It seems like we both have the same issues. My psu passed the paperclip test and even powered on their motherboard but failed to with mine. I have also tried testing a new motherboard with the psu and no lights either. I think my psu maybe frying my motherboard but am in the process of ordering a new psu. Will keep you posted when my parts arrive.

 

[gondo]

All the paperclip does is start the power supply instead of using the case power button. It doesn't tell you the voltages, amperage capacity, or DC ripple it is outputting. Just that it turns on and nothing else.

Have you considered something as simple as a faulty case button/wire. Short the pins on the motherboard to try starting the system. I assumed you did that since the board was outside the case.

What did you put the motherboard on outside the case? A good thing to use is the motherboard box. Way back 20 years ago these parts wern't as good quality or diode protected and static would kill them. So it was good practice to lay the board on top of the silver static bag for the motherboard while assembling the ram/cpu/heatsink/jumpers. But I have seen people test their board outside the case laying on top of the bag because they thought it was safe and power it on and short the board to crap and ruin it. Those silver bags conduct electricity so don't use it when powering up the board.

As mentioned previously the board should start up for a sec with the fans starting up for a brief second before shutting down. If you get absolutely nothing I'm suspecting the PSU although I have seen a CPU cause that same problem.

 

[elthztek]

I can post the motherboard + with lights but if I add the cpu, I cant get any post/or lights I assume the CPU is faulty.. damm

 

[elthztek]

Got a brand new corsair PSU, anyway. I am able to boot the motherboard however I cannot jump start it with the CPU inside it. Therefore I assume the CPU is faulty.

🙁 I already started the RMa process so I will send off on Monday. Sad times.

 

[R_1]

what are your complete specs?
the new PSU is a CX series?

 

[elthztek]

what are your complete specs?
the new PSU is a CX series?

yes its. CX series,
Im using a

​

MSI B450M PRO-M2 MAX

I currently have a ryzen 5 2400g



// Just to as origin story my entire PC went bust, old PSU sounded like a surge. No idea what happened, finally brought replacement parts, and have nailed it to the CPU faulty.

 

[yeung107]

Got a brand new corsair PSU, anyway. I am able to boot the motherboard however I cannot jump start it with the CPU inside it. Therefore I assume the CPU is faulty.

🙁 I already started the RMa process so I will send off on Monday. Sad times.

Did the cpu fry the motherboard too? Or did it not allow the Mobo to post?

 

[elthztek]

Hello, there hardware wizard...

My PSU fried my CPU & MOBO, and I can 100% confirm as CPU no longer will work in my new motherboard, the motherboard wont post/light up. My question is what are the chances that it also fried my GPU?

Specs

• Ryzen 5 2400g
• 8 GB RAM
• B450M chipset motherboard
• 580 RX Radeon.
• CX series CORSair 550 w.

All new replacements parts have been validated to be working and work with all the parts mentioned

 

[elthztek]

Did the cpu fry the motherboard too? Or did it not allow the Mobo to post?

It won't allow the mobo to post on the replacement motherboard, the original motherboard is a dead as a duck. I can also post the new motherboard without the CPU in question, so this shows that it's faulty.


I assume it has not made motherboard faulty as there is still post happening without CPU & EZ debug led's