How to understand what is not working, processor or motherboard?

Question

Iron

I have an HP AAHD2-HY REV:1.03 motherboard with an AMD A8-3800 Series Processor
When I try to turn it on, zero response. What with RAM that without a beeper does not emit a signal. Coolers don't work. BIOS reset. No visual defects are observed. Changed the battery.
The question is, how to understand whether this whole thing works at home?

Answer 1

The dumbest and easiest way is to change components one by one. And dance from it.

Answer 2

"beeper does not emit a signal" without components - already a sign of a non-working motherboard

Answer 3

Without obviously serviceable test components - in any way. A motherboard without a processor (or with a faulty processor) will not beep, even if everything else is working.