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RP844 is also 10 ohm... Changed them with good 0 ohm donors from an 820-01598. Still same...

noticed that RP845 is 10ohm instead of 0ohm... Should it make a difference such low difference>?

DP800 is not shorted A= 0.937 w/ and w/o screen K= 1.251w/ and w/o screen

RP850 starts with 5.1v as soon as image apears goes to 4.9v, diode mode 0.491 RP851 starts with 5.1v as soon as image apears goes to 4.8v, diode mode 0.491 RP852 5.1v, diode mode 0.276, also give 1.3kohm, according to schematics should be 1.8kohm RP853 5.1v, diode mode 0.276, also give 1.3kohm...

Yes, sure tested with 2 different screens. Screens work on other board. UB050 area very clean... Measured alle traces on UB050, diode mode readings all ok according to PLDaniels.

BL_PWR_EN is getting also 0.8v...

I get picture for shure! Will check BL_PWR_EN… But what is correct voltage for BLKT_EN_R?

Hi, Got a perfect logicbiard no traces of liquid only on pin 17 en 18 of UP800. Got chip off and saw that pin 18 was corroded bad. Cleaned it and replaced UP800 with one from 820-01598 (according to PDF, same model) Chip should get 5v. Diode mode readings are ok except for pin 17 and 4 Pin 17...

I don't understand this part...

I tested while one chip was removed and then got 20v on the other side. And UPC_I2C_INT_L was high... But doesn't this mean there is no communication between the chips. That's why it's not getting pulled down. I'm thinking as soon as the communication begins it's getting pulled down. With only 3...

I tested all four CD3217 chips with diode mode... Every single point on them! (Hell of a job!) All 4 are same as know good board. What I noticed is that UPC_I2C_INT_L is 13 Ohm to ground when power is connected. So It looks like is being pulled down. When I look with thermal imager only thing...

So actually what I see is R5200 is connected to other resistor R3021 and RB241. R3021 is the going to U3100 & U3200. RB241 is going to UB300 & UB400. same for R5201 is connected to other resistor R3025 and RB242. R3025 is the going to U3100 & U3200. RB242 is going to UB300 & UB400. Is it...

Ok, weird enough all diode mode readings look good. But when I check voltage I see some weird stuff. I checked UPC_I2C_INT_L 0v R5246 1=1.8v 2=0v R5200 1=1.8v 2=1,4v R5201 1=1.8v 2=1,1v On working board all voltages are 1.8v So looks like something is pulling them down. How can I find out what...

Reflashing of TBT Rom's did nothing... The CD3217 are the original ones they are untouched! Maybe I can just compare in diode mode all pins of cd3217 with good board, I don't have to change all cd3217?!

PPBUS_G3H is 12.25v charger alone. I did another dfu restore and it works with battery and charger connected. Amp meter shows 20v 0.1a. I bought original 96w Apple charger. Charger works with good board perfectly. Today I saw a Spanish video (used CC with translation) on YouTube Who had same...

Ok, got it back to working on Battery... Need some help figuring out why ppbus won't go up to 12.6v Feels like im so close!

Before I look at the TBT rom area. I noticed that after I flashed the SoC rom with the working one. It now stays in DFU mode. Even when I restore or revive it can’t complete and always stays in dfu mode… Also put back the original Rom file, can’t get it to boot with battery to anymore.

Those are TBT rom files, you should look for the SoC (U4770) Rom file...

No, without battery doesn't work. Machine works on battery with charger connected but doesn't charge. I tried a SoC Rom flash. Didn't do a thing... All USB-C port have same behavior...

Also as you can read, this board had some issues before... Around UB090 USB-Rom chip. Could that have effected the communication with T2.