Problem with CPU, need help identifying what to replace.

[sunflowerr]

Having an issue with something on start-up. I was getting an error for DRAM previously and now it is a CPU error. No fans/GPU on start-up, but the fans linked directly to power supply turn on. Tried reseating the RAM and tried single stick and rotating the ones I use, and I still get the same error. I had a cooler master CPU cooler hooked up and I have since removed it entirely and removed my CPU entirely, I had cleaned it and check for broken or bent pins, and did not find any. So i then reseated the CPU and applied thermal paste and the stock cooler, tried to power on and got the same error. If anyone has a solid idea one what needs to be replaced it would be greatly appreciated and if any additional information is required I will do my best to provide it!

Solved:
Make sure all your chords are fully plugged in after doing a repair! Loose chord by the ram was the culprit in this situation, thankfully nothing needed replacing!

 

[Supahos]

Cpu/motherboard/ram/gpu/power supply?

How long you've had it up and running?

Recently change anything?

 

[sunflowerr]

We have had it for two years, these problems started after replacing my cpu with the cooler master unit. This is the second time since installing that it has turned off completely and restarted itself with the DRAM error. The first time I switched my RAM to the other two slots and it worked again. This second time it turned off (most recent attempt) and that is when I tried all the above. The first time all my fans turned on with the DRAM error, after that they did not and the DRAM error went to a CPU error. I hadn't turned it off since it shut itself down and I switched the RAM (about two weeks ago).
CPU is an I5
Motherboard is a B250M Bazooka
RAM 2 - 4gb DDR-2133 1.2v Crucial by Micron
GPU is an RX480 4gb
Power Supply is Thermal Take tt-1225
I appreciate the time and help! if you need more info please ask.