Loud cpu fan

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Cpupalma

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My cpu’s fan is very loud and my computer will only get power through the power button on the back of my computer
 
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Does it run OK even though it is loud and you are using the power switch on the power supply?
 

Cpupalma

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No I can’t turn the computer on through the front power button but power still goes through a button on the back of my power supply that will stop giving power if you let go
 
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That button is a test button and generally does not really turn the PC on. It also means that the PC is not even trying to initialize so the CPU fan runs at full speed.
The first real test is to try a different power supply. Can you do that?
P.S. What is the make and full model number of the PC?
 

Cpupalma

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I have tried different power supplys but it has the same reaction and I’m not sure how to find the model number if you could tell me how I would greatly appreciate that
 
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If it is a major player (HP, Dell, etc.), it's on the same sticker as the serial number which is now sometimes on the bottom of the tower. If it is assembled from parts, the key part number would be printed on the system board ( i.e. MS-7778 Rev 1.0 ) in fairly large print.
Regardless, with two different power supplies tried, you have an overloaded USB, a memory failure, a CPU failure, or a failed system board. Unplug everything USB with the PC unplugged from the wall outlet (or power strip), push and hold the power button on the front for 10 seconds, plug the power back in, and try it using the front button. If it still won't turn on, do the same; but, remove all but one of the memory modules and try again.
 

Cpupalma

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My computer model is MIH81R Great Bear
, and I tried what you said above and still no response from my device.(this is what I think you wanted me to look for)
 
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That part number is for the system board (motherboard) for a Dell computer; but, it can be several different models.
On the top, side, or bottom of the outside should be a sticker with SERVICE TAG printed on it. What is the SERVICE TAG number?
P.S. The first number you posted ( B-300NM-01 ) is a Dell power supply.
 
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You have an Inspiron 3847 and here is your support page:
https://www.dell.com/support/home/us/en/04/product-support/servicetag/8278t52/diagnose
If you have actually tried two power supplies, unplugging the USB devices, and removing one of the memory modules, it's the system board that is bad. Luckily, you have a socketed (LGA1150) CPU chip and the board itself isn't too expensive. However; what we really need is the Dell Part number of that board. On a fairly small, square white sticker, should be an entry saying D P/N and a common one for that PC is 088DT1.
Are you up to replacing the system board? You will need some thermal compound for the CPU chip and a number 2 Philips screwdriver.
 

Cpupalma

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Hello DavisMcCarn thank you for finding out what was wrong but I have bought a new computer after I found out that my graphics card cpu and power supply have all broken. I do not know how but it happened after I attempted to replace my graphics card with a high-end one that my power supply did not have the correct pin connectors for it
 
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No, your Dell would not have handled a graphics card that needed more power; but, I seriously doubt that all those parts got blown. I believe you had a fried system board in the Dell and a replacement would have been about $70.00.
As a note, I have only seen two confirmed dead Intel CPU's in 42 years of fixing these things. The onboard video chip is part of the CPU.
 
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