Misbehaving LC 575

[l0ne]

I have an LC 575 I am trying to rescue, when I first got it, it death chimed then proceeded to never power on again.
I then tested the chassis with my mates logic board, to find out that the chassis is completely functional and that the issue resides with my logic board.
I recapped the logic board and still no life other than the initial thunk when power is connected, so I took matters into my own hands and read through the logic board schematics and discovered I can manually start the power supply by connecting TRICKLE+5 to PFW through a button, which I tried..
And to my amazement the machine sprung to life again! still with a death chime though..

At this point, soft power works extremely intermittently, along with power on as a whole being quite intermittent, when the machine powers on it just death chimes, sometimes varying in speed.
I don't know what to try next from here, however the soft power issue is screaming some sort of issue with the CUDA to me.. I'll attach some videos of the machines behavior and a picture of my logic board, I hope someone here can recognize what this machine is trying to tell me... I so badly want to rescue it

Misbehaving soft power / power on
Death chime

(the caps next to the CUDA are not the original electrolytics)

 

[ArjenCNX]

I have 3 boards with a similar issue, i used the thermal cam to compare good to bad boards, and found the cuda doesnt get warm. also i measure 33.1MHZ on the crystal, but just 7KHZ on the output of the cuda chip (pin-8) i have just verified, you should find a 16mhz sine wave at 10V P-P, my bad boards do not show it, i replaced the cuda, (U20) with a new chip, but that did not solve it. it unfortunately usually is battery / capacitor leakage damage in my case, your board looks pretty good, but i'd still check for rotten traces/Via's. if you have access, use a microscope, or other magnifier, as these things can be invisible to the naked Eye.