That is the standby 5v circuit. It likely went when the cap went. The cap saw extreme overvoltage or possibly too high of ripple current.

You will need to change all the parts in that regulator. Diodes included.

But..... you will need to check the mosfet in the PFC boost circuit as well, it could have went out of regulation and blew the cap as well.

There are many many things that need checking. Overvoltage seems to be the cause.

It might be far easier to replace the power supply.

But you may find the mainboard dead as well.

Another scenario involves the main CPU shorting out when a surge/spike hits the HDMI. this will overload the regulator and blow up the power supply. I have seen this a few times as well. Inspect the HDMI ports for surge/blast damage. Cheaper tv sets route the HDMI directly into the processor, makimg it highly vulnerable to spikes. Older/more expensive sets use an outboard hdmi to Rgb converter IC before it goes into the processor.

I have changed dozens of those ICs, because they fail and dont take the cpu with it. But the cheaper more integrated processors do not survive.