Pc wont boot

[Sxnchez]

I have a optiplex 750 mother board with an i5 3470 in it when ever i try to boot it up the cpu fan spins for 2 seconds then stops and repeats with no display the only way i can get it spin is by taking out the ram and ive tried different slots and sticks as well

[Timo27]

Has this pc worked before?

[Sxnchez]

Its the first time trying to boot it

[Timo27]

Is it second hand or did you just buy it? because if you just bought it than you should have some warranty on it.

 

If you want to fix it yourself, then i would recommend resetting the bios. Its called clearing the CMOS. You can lookup online: „how to clear CMOS“. It‘s very easy to do and is one of the very few things you can do without a working operating system or bios. This might fix your problem. 
quick note: I have to go to bed now (its midnight here). But ill try to stay in touch tomorrow. Good luck!

[Sxnchez]

It was second hand i tried the cmos trick it didnt work maybe it needs a bios update

[Sxnchez]

I found out the problem 3rd gen isnt compatible 

[Timo27]

You have an intel CPU. The 3rd gen problem is only an issue with ryzen CPUs. Or does your compatibility problem concern something other than the CPU? I just dont want you to buy something and then find out its still not working . 

[Timo27]

You have an intel CPU. The 3rd gen problem is only an issue with ryzen CPUs. Or does your compatibility problem concern something other than the CPU? I just dont want you to buy something and then find out its still not working . 
 

Edit: after further research i did discover 3rd gen motherboard compatibility complications with intel. I have never heard of this before! I’m glad you found the solution to your problem. Thank you for teaching me something!  one learns something new everyday...