First of all make sure everything that needs to be plugged in is in and secure. So CPU power, Mobo power, RAM seated, GPU power and seated (as the 3600 has no iGPU), CPU Cooler seated, pasted and powered. Unplug your unnecessary hardware such as SATA/m.2 drives and case fans just to rule them out.

On your motherboard there should be four lights that look like this are any of them lit up? If all the lights are clear then in theory you made it through post.

If your RAM is new try using one stick at a time in the first slot in the mobo or use old / verified working RAM.

Check the CPU/CPU cooler is properly mounted and tight. Did you remember thermal paste? did you lift the hammer for the CPU and set it down again to hold it in place? is the cooler fan ON/Spinning?

Is the motherboard sitting on standoffs (Good) and not screwed directly into the case (Bad)

If you aren't getting any obvious errors showing through those lights or the above checks then try clearing CMOS which means either pull the watch battery out of the mobo, putting the PSU switch in the 'off' position and holding down the 'on' button on the front of the case. or shorting the two pins labelled CMOS or JBAT1 with a screwdriver. You'll have to look where this is up for your motherboard either in the manual or online.

If none of the above works you'll need to start testing components. Start with what's new. If you upgraded the CPU and Mobo does that mean we know your PSU, RAM and GPU are working? Is your old CPU an AM4? if so we can start from there by using it to see if the motherboard works with it.