820-01987 No S5

[prodigy83]

My reference only: REF1135

Board history: Liquid damage, around J8500 there was heavy rust, parts were off. I have replaced what parts I do believe I need to at least get an image on an external monitor but no go.
USB meter shows 20v, and when I place it in to it's shell it does pull .79 amps, but it will jump down to .2 amps.
I have been able to force it in to DFU mode but it will not revive or restore. I get the below message:
"The System cannot be restored on this device.
Gave up waiting for device to transition from DFU state to DFU state. [com.apple.MobileDevice.MobileRestore – 0xFCA (4042)]"
P5VG3S_EN_DLY I get 3.29v, but after a few seconds it drops to 0v, then back again to the 3.29v.
PM_SLP_S5_L: 0v
PP3V3_S5: 0v
The board does heat up around U3900.
PMU_SYS_ALIVE: 1.79v but drops to 0v after a few seconds then back to 1.79v.

 

[2informaticos]

You may have SSD problem.

Did you check diode mode on all secondary power rails?

 

[prodigy83]

I am sorry, where am I supposed to be seeing these secondary rails at on the schematics? I figured I should be using the FCT on page 83. I am used to seeing the Power Aliases in the table of contents.

 

[2informaticos]

"where am I supposed to be seeing these secondary rails at on the schematics?"
Between pages 65-74; also 81...