The white light of death problem is a an issue that has plagued many systems. one of the main reasons is the HDMI port. However if it is not the HDMI port Usually what happens is that the Signal Circuit gets messed up. And that is due to many different reasons.
one of those reasons are your TVs. Even though the PS4 motherboard is protected from voltage spikes. some TVs can expose that circuit to levels that burn it out!
We detect, diagnose and replace all bad components.