not 100% sure but if youre unsure about the port itself my method for hdmi ports work great for 99% of consoles and super easy, would be way easier to just try the port again and see if it still has the ylod issue then pursue the hdmi ic or other things. try hot swap method, heat gun on bottom...
WOW 10/10 fantastic explanation on those codes. sorry for responding so late i had no idea someone bit on this post. I definitely think the rsx is toast and needs replacement as it works again but sometimes takes 2-3 cycles to actually boot and will still randomly crash and ill have to unplug...
I managed to resurrect a ceche01 ps3 from ylod with my hot air station a couple weeks ago and did thermals, and installed hen and eventually evilnat and was getting random crashing during anything intensive with the 3 beeps and i figured it was overheating still and maybe nec tokins are bad, so...