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also PPBUS_S5_HS_COMPUTING_ISNS is 12.45v

I have an 820-3115 liquid damage around SMC. Originally no magsafe light. Removed and reballed SMC, now I get magsafe and fan spin with the fan at full speed after 5 seconds. CPU has a little heat in it after a min or so. ALL_SYS_PWRGD = 3.29v PPVCORE_S0_CPU = 0.00v I'm stuck with this one...

Took off the pad, dug down and separated the short. It had burnt the fiberglass layers under it so bad that it was shorting under the pad. I've removed the short now and i'll attempt to run trace wires in its place instead

Unfortunately its a short within the layers under pad 1of C7220 :( Not sure if this will be fixable

It's pulling 2.42a @2v but nothing seems to be heating up

Do you think maybe remove U7410,20,30 to see if shorted?

Had to edit the last post as my readings were wrong

The closest to 0.002ohms are L7410 @ 4.8ohms, L7420 @ 4.9ohms and L7430 @ 4.9ohms. L7210-7210 are both at 10ohms. The rest are 60ohms on a couple and Kohms or Mohms to GND

0.002ohms PPBUS_G3H_CPU to GND

Hi I have an 00875 board with an exploded C7222. Removed the capacitor and others around it on PPBUS_G3H_CPU. PPBUS_G3H_CPU is still shorting to ground with them removed but I can't locate the short anywhere. Its 0.000v on diode mode. I've tried a little voltage an some alcohol to see if...

Swapped out LP8550. (looking at the state of the LVDS connector originally, I'm not surprised it was dead) now works perfectly. As ever @2informaticos thank you for your help.

Actually.. tried one more time and got fan spin back.. I now have screen active but no backlight. I can see it booting OSX

Nope, get green and orange light but no fan spin. I'll have to start again

Okay, I'll heat it up and give it a couple of taps and little nudges. Its dancing while at reflow

not sure if the SMC didn't survive the heat cycle or I messed it up, but I have no fan spin at the moment. SMC looks like its on perfectly under the microscope. Looks like I'll have to take it back off.

Tested all SPI Bus Series Termination resistors R6110 R6111 R6112 R6113 R6118 R6119 R6114 R6115 R6116 R6117 R6120 R6121 R6122 R6123 R6130 R6131 R6133 R6132 R6128 R6127 R6126 R6125 All test as schematic, can't see any issues with traces on the microscope. Going to reball the SMC now

PLT_RESET_L is 3.3v The BIOS chip was from a dropped 820-00165 (dead CPU) so the bios should be okay but I suppose it could be also faulty. The only programmer I have is SOFI SP8 for doing bios locks on the old A1278/A1286 boards. I haven't programmed the bios on A1466 before, sorry.

Bios chip swapped but doesn't seem to have changed

I've tested with two seperate USB that I know will boot. Neither of them flash continuously like it is booting the OS. Tried with internal SSD removed also, don't think it is trying to boot.

Yes, no image, no backlight