There are 2 things that will sometimes fix this problem, but it is definitely not a guarantee. Many times with a power surge the power goes through the HDMI port and through the HDMI chip. Sometimes replacing one of both of these items will get your PS4 working again. If replacing those do not fix it then it's a matter of figuring out what other components are burned...if any. If there are no visible defects then it could be virtually impossible to find the problem.
I hope this helps.