Vizio e50u-d2 has no power

I've been trying to diagnose the issue with my Vizio e50u-d2 tv. I don't think it is getting any power and the standby light is not on. I'm considering buying a new power board but I wanted to discuss with someone if that is the right next step. this was the most helpful ifixit thread for my situation. I appreciate any help or insight anyone has. Here is what I have tried so far:

When I opened the tv I checked the resistance on the fuse and it showed infinite resistance so I assumed it blew out. I also checked the resistance across the green varistor right next to it and it was reading around 1.04 mega ohms and it visually didn't look cracked for burned, so I assumed it was good based on this link that was recommended in the ifixit thread I linked above.

I removed the fuse and soldered in a new fuse of the same type (T5A250VP written on the fuse, ceramic axial slow blow fuse in the product description, and visually looks exactly like the one installed). The solder seemed to have good flow and the joints looked pretty clean (FS801 in the pic below). I know this isn't a perfect test, but I checked the resistance between the outside wall of each solder joint and the fuse itself. This showed <0.5 ohms so along with the visual inspection it gave me some confidence that the solder joints were good. I then checked the resistance across the fuse after soldering and it showed <0.5 ohm resistance (shouldve checked it before but I forgot, turned out ok though). For reference my multimeter only reads as low as 0.1 ohms I think.

So I then plugged in the tv to a surge protector. While plugging it in I wasn't looking at the tv, and I couldn't hear it very well, but what I think happened is the fuse blew as soon as I plugged it in (within 5 sec). I think I heard some faint electrical noise and maybe saw a flash in the corner of my eye, but it's difficult to know for sure. Now when I went back to the tv, there was no standby light. When I opened it up again the fuse showed infinite resistance so I assumed it blew again.

So obviously there is something else wrong with my tv. I'm still assuming it's the power board and I'm considering replacing the whole power board. I didn't notice anything visually that seemed wrong with it, like scorch marks for example, but I've added some pics of the board below if y'all notice anything that I don't.

I also tried testing the power cable. It also has very low resistance on both prongs. The cable visually looks brand new, no damage. When I plug just the cable into the surge protector I measure 115-120 V AC on from free end.

I appreciate any help or insight anyone has. If there's other things I should test, please let me know. Thank you in advance!