For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.
Looks fine? Measure it!
If R7402 is ok then measure voltage on Y2805 should not exceed 1.6V else clock chip is dead.
I assume this was a liquid damage?
if resistance over C7050 doesn't exceed 2.2 to 4 ohms then U2800 is probably dead. so check duke's advice because that is the best way to tell if U2800 is dead. i am also going to guess your liquid damage was on the rim, by either vp0r sensor, thunderbolt area, or smc. even if the clock chip has no corrosion or water on it, just water in that area, it means it is dead..