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In initial state phone was only searching for service. Then I changed U_DSM_RF. Now it stop searching after a while and then it just stops with no service. Any ideas what should I do next?

No history. It does not seem to have liquid damage and corrosion. There is image if I connect an external display. Though it freezes at half of boot. Also I could not seem to able to boot from external HDD. So it seems a bit more complex. I am not able to test with another LCD. Where should I look?

Coffey spill. But board did not get too much damage seemingly. Only obvious thing was a cap (C1910). I changed that. After that it did catch green light, it even started okay with lcd. Then I connected the battery (which had corrosion before on the logic board part ). After that the green light...

No liquid damage or anything unusual. It was sucking around 0.2A. Changed U2. After that 0.6-0.7A. Still wont turn on. Measured important power rails that go in and out of PMIC. Most of them are okay, except: PPCPU is 0.5v instead of 1v PP_GPU_SRAM is only 0.15V PPGPU is missing. I did measure...

A1224 (EMC 2210) It wont start at all. Only first diag led is on. When I want to turn it on the fan spins up for a second (quarter fanspin style) and at the same time the second lend blinks one time. Tried with another good power supply. It does the same. Ideas?

A1224 (EMC 2210) IMAC boots extremely slow (45 minutes). Tried with another HDD, hdd cable, external hdd and ram. Same issue. Any idea?

No liquid damage. SMC_LID is 3.4V LCD_BKLT_PWM is 0V LCD_BKLT_EN is 0V PPBUS_SW_LCDBKLT_PWR is 0V Tried with another LCD too...

No liquid damage. PP3V42 is 0.6V PPBUS is 1.2V ACOK is 1.1V Change C7771 as usual culprit? Any other suggestion?

Booting only half way then it reboots. Sometimes with a horizontal line across the top. Tried with good boot HDD and another PSU. Same Any idea? I read in another post that it may need a clean ME. Could that be the case?

It wont recognize the battery in any way. What should I check?

Board got on over-voltage because the non original charger exploded when it was in use. It takes some minutes for the orange light to appear. PPBUS, PP3V42 and ACOK all are normal. Any idea? Change ISL maybe?

Board is ths one: https://www.rossmanngroup.com/boards/forum/board-repair-troubleshooting/6532-820-2850-a-gpu-panic-and-green-screen Continued here... Reballed MUX. It solved everything. It did work for a month or so now kernel panics re-appeard. Even worse than before (now with bot GPU. and...

Board will not recognize and charge the battery. Any suggestion?

Board only had PP3V42. Changed ISL. Then PPBUS and ACOK returned but still no green light. Board looks almost perfect, no sign of corrosion as far as I can tell. Any suggestion?

Board had a little liquid damage. Thunderbolt is not working.

Any idea where should I look?

No Liquid damage. Tried the ram slots with multiple sticks of good ram. Most of the times only 3 beeps. Sometimes it will start with the bottom slot only but on boot kernel panic followed by restart. First conclusion was that both slots went bad (came across a case like this some time ago). I...

Board has very weird behavior. It did not had green light initially. Changed the IO board. That fixed it. After some days of sitting I could not get green light again so got out the board then I could have green light. So I checked the flex cables and came to the conclusion that there is...

Liquid damaged board had been worked on already. Possibly SMC reball and other repairs. Current state: Green light, all hot and S5 rails present. SMC_BC_ACOK is present. R7005, R7021/22, R7051/52 are fine. Board is looping with quarter fanspin. Any idea where to look?

Did run efi ASD on it got no errors. Any idea?