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How to detect a motherboard failure.

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Good evening, I'm a computer science student and I have a little problem that I can't fix.

 

About a year ago, my first tower computer decided to die in the middle of final exams. So as a good student that I am, I started testing. I tried to disconnect the processor, the ram, the hard disk, and all the components of the board to see if it turned on.

 

The fact was that in the end it was the board, and the only thing I had to do was process the warranty for the computer, which was preassembled.

 

So I decided to build my own computer. The fact is, these days the computer is failing again with the same symptoms as the previous one. And here a question arises, is it possible that in both computers the motherboard is the problem?

 

At the moment these are the symptoms:
- Sometimes it turns on and sometimes it doesn't, depending on when it wants.

- Once the computer is turned on, it does not give any problem.

 

What do you think? Could I have just had bad luck or that there are other factors that I do not know?

 

Thanks in advance.

 

Edit 1: MSI B450 GAMING PLUS MAX

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-> Moved to Troubleshooting

^^^^ That's my post ^^^^
<-- This is me --- That's your scrollbar -->
vvvv Who's there? vvvv

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Posted

Sounds like a power supply maybe?

Please post all your components, mobo, psu, processor, gpu

Also, when did this start or has it done it since it was built?

 

When it wont turn on, unplug the power cord and while it is unplugged, press and hold the power button for 5 seconds.

Then plug it back in.

Will it now turn on?

If so, does this resolve this repeatedly?

Daily driver (looking to upgrade mobo and cpu spring of 2021)   --- The only time I sort by price from high to low is when I am shopping for CPU's and GPU's (looking for a cheap i7-7700k though)
Mobo: ASRock Z170 Extreme7+  CPU: i7-6700K @ 4.6MHz OC  Cooling: Corsair H115i Hydro  Memory: TridentZ 32GB @ 3600MHz  GPU: EVGA 2070 FTW3 ULTRA+ (OC'd 50/300)  
PSU: Corsair HX850i   Storage: 980 Pro 1TB, 950 PRO 512Mb, (2)ADATA SU800 1TB  Keyboard: Logitech G910  Mouse: Logitech G502   Headset: Logitech G930 UPS: APC Pro 1500 S

Unraid box providing network routing, home automation services, and media services ( I love unraid!)

USB Key: SanDisk 16GB Ultra Fit  Mobo: Intel DX79SR Extreme+  CPU: i7-3820  Memory: 16Gb Kingston HyperX Predator  Storage: (cache)480gb Micron SSD (1)8TB HDD (1) 4TB HDD  
GPU: MSI GTX 1650 4GT LP OC (passed through to Emby)  NIC: Intel I350-T4 4-port Gb (passed through to PFSense)  UPS: APC PRO 1000
Docker Containers: Emby and Home-Assistant-Core  Virtual machines: PFsense ( I love PFSense!)

Family machines
Mobo: Asus Prime H310M-E  CPU: Intel Core i3-9100F  Cooling: Deepcool Gammaxx 400  Memory: Teamgroup Elite Plus DDR4 16GB  Storage: Silicon Power 1TB NVMe M.2  
GPU: Asus GTX 1660 Super 6GB or EVGA 1070 FTW 8GB  PSU: Thermaltake Smart 500W 80+  UPS: APC XS 1300


As well as a number of other machines, a ton of parts, miles of cables, and who knows what else!
Private message me for quicker assistance. I also build and ship custom machines at a really fair price.

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This started one week ago. Also, I have the oportunity to test the psu with a tester and all the values were correct.

 

No, the computer doesn't start in anyway.

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