clevo P377SM-A black screen and beeping

so this all started when i was playing a game. i experianced screen tearing. then the computer locked up.
i restarted to a blackscreen and just fans spinning.
fast forward like 1 month

i have since then replace the ram, motherboard, gpu(980m)
it will still not post. it just sits at a black screen and beeps until it eventualy just shuts its self off.
the beeps are all the same, about 1sec apart.

any help on this matter would be much appreciated!!