Recent content by 2informaticos

These readings should have very similar value. Possibly damaged U9850...

Tested with charged battery? Check diode mode on all secondary power rails. Compare readings with good board.

I said 1 & 3...

Check diode mode to ground on pins 1 &3 of J8500. Do you get external video?

Any history fault available?

What board is? What is the problem?

Other G3S voltages present and stable?

Then you still have problems on USB-C power areas. Did you test with Magsafe 3?

Force off the machine; hold power button more than 5s. Then try again DFU; better using external switch method. https://logi.wiki/index.php/DFU_Mode_Restore_(Macs)#DFU_Mode_using_external_switch

Do you note any fluctuation at PPBUS_G3H and 3V3_G3H_RTC? Compare diode mode readings around U7800 with good board. Also test with charged battery.

You can order the CD3217 chips needed here: https://www.masterliuonline.com/collections/common-chip?page=3 Master Liu will send them marked, so you can solder them on the correct possition. In the future repairs, you can re-test your chips soldering them one by one on other similar board. Not...

This problem can be solved sometime using ethernet connection, or shared wifi internet from a mobile phone. Can you run embedded diagnostic?

Did you test with known good battery?

Board should turn on without amplifier chip, for test.

Yo MUST solder the chips in the same position. If you mixed 3 chips, not easy to find the correct combination now.