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Ok thanks for the info Duke. Ill be buying some now. I think I had some of these that I replaced on 2 other water damaged boards but currently out of stock. Ill see if the customer wants to wait or just roll with the software. Thank you both

realmacmods didnt know you were on here. Yes seems to be working great. If you dont mind spilling a few beans what seems to be the root cause? Is there proof in older firmware that they dont drop voltage that low? Is this literally a flaw in Intel Power States where the CPU is put at such a low...

I think the CPU Power Controllers could be a possibility but I would think they would fail under high load not low load. I have done those before on boards with obvious shorts on output.

Had a 820-3662 come in for random shut down. No liquid. Checked all the rtc stuff and caps normally checked. Seems fine. Found a script online claiming the shut downs are caused by a lower power state bug in the CPU that causes failure when the CPU enters a lower power state. Before running...

Finally got it to take the update after just pushing it over and over. This was a nightmare of a computer.

Still having the same issue with the new firmware. the Boot Rom still reports as 112.0138.B07 and if I try to install High Sierra it will go through the install that takes 4-5 mins then when it reboots it goes directly back into recovery mode. Sometimes the SSD shows up and sometimes it doesnt...

Thank you sir

Yes installed El Capitan to the original SSD. Up and running connected to wifi. Tried to update to High Sierra from inside the OS and it finishes the first install, reboots then fails update.

I could find the SN in the original dump just then but unable to find the other part I needed.

https://drive.google.com/open?id=1usLFXlsIoeWJ4W10I0FG5El5CsFlwxlb

Ok one second Ill dump it and post it here. Thank you Duke.

This may not be a directly usable Firmware Im not sure. It may only be useful for updating the Bios. If anyone has a dump of 820-3787 on High Sierra it would be helpful.

This computer cannot update to High Sierra. It will install up to El Capitan with Rom Firmware of 112.0138. If you try to update to High Sierra it fails install stating there is missing files required to update. Ive also taken it to my local apple store across the street who works with me on a...

Customer doesnt want to wait so I guess Ill have to give up here on it. Sucks because its so close to working.

Diode readings on the pin 1-45 are as follows 1 .412 3 .749 5 .759 7 OL 11 .751 13 1.06 17 1.64 19 1.64 23 .750 25 .750 29 .361 31 .365 35 .562 37-41 .351 43 .430 Even Side 2-44 2 .460 4 .435 6 OL 8 .510 Data lines 10-28 are OL and GND is 0 which seems normal 30 .430 32 .430 36 .516 38-42...

U9300 was a new chip from RossmannRepair. Dont have a donor board for this model currently. Diode readings will be a guess if they are ok or not. Obvious OL or 0 will be questionable

J9600 was clean. No corrosion on that connector. Ill check both sides.

SSD_RESET_L is 0v but if I disconnect the Life Boat Connector the voltage on the feed side is only 0.6v

Liquid Damage Had a main line short wouldnt boot. Removed short and it boots. Flashing Folder Checked U9300 found a short on PP1v8_SSD_Cold Replaced U9300 short gone I get 0v on L9340 and L9330 PP3v3_S5_SSD is 3.311v Storage_LB_EN is 3.3v Storage_EN is 3.3v SSD_PWR_EN_L is 0v (when a line says...

I dont have an oscilloscope for the crystal but I can give you voltage average my MM gives me. Be back shortly with those.