Chosen Solution
I have replaced thermal paste for my ps4 a week ago and afterwards it worked perfectly fine. Ran quieter, better heat exhaust, etc. But after a couple days of it running perfectly, my TV no longer gets a signal. When I turn the ps4 on a blue light flashes for a whole which eventually turns white, which if I am correct is how it normally boots up. I am just wondering if I might have messed something up or if it could be a problem with my HDMI and how to fix it.
Is The port damaged from the outside? Do you see any misaligned or uprooted pins if you look directly into the HDMI port from the outside?
Did you try any HDMI cable?