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on Q7155 I have only battery connected 1,2,3) 8,3V 4) 1.5V 5) 8.3V DC in and akku connected 1,2,3) 8.55V 4) 8.55V 5) 8.3V the same I could measure with a good board, that is working fine with the same akku in standalone

hi, I just got this device with liquid damage. was running, fan full speed and no akku to see, I cleaned it and replaced the smc after that fan was good and akku to see, communication working but still 8,22V PPBUS_G3H now still replaced U7100 and PPBUS_G3H has now 8.55V, so i2c communication...

yes, I did both and after that i tryed to install Monterey but everytime I get the yellow screen Installing Catalina is no problem

i coulnt fount any matching warranty programm and yes for this client its important to update this machine. is there no way?

same yellow screen on both display if used an additional external display

12.4 installion from usb stick same problem, after installation cames the apple and the about 25% of the loadbar, after that it is switching to the yellow screen, the cursor is possible to move i tryed with all 4 rams one by one but the same i tryed an working 12.4 installation from external...

is this yellow screen a possible faulty RAM or ssd? the catalina is working without any problem. Maybe the 12.5 has problems? I try now to install the 12.4 from usb stick

thanks, that is working, so far so good, but how to update the machine without problems? what would you suggest?

Hi i got an imac 27" 2020 in with failed update (from catalina to Monterey) turn on yellow screen I started in Transfer Mode and made a backup from the data then started DFU Mode and made a reset, after that i started with alt and "R" and got Catalina installed, normaly running seems all ok I...

yes you are right nothing to loose, 2 more donar boards, thanks for help, case solved

there is all 0V Checked on the caps C8520-C8529 on CPU side and found out that C8529 pin 1 (EDP_AUXCH_C_N) has OL all the others have aound .212 I have the another same board with the same problem and checked this and same, C8529 CPU side OL The "good" board has on all caps the same value in...

Hi, got this board, looks clean no signs of liquid. no image, no backlight external Display shows image have connected a tested new display, with another mainboard, same flexcable image and backlight is ok. tested already this things: DP_INT_HPD pulse to 3.3V BKLT_EN_R 0V no pulse...

I tryed now installing Mojave on Host the target is imac pro 2018 mojave i tryed the host with a a1706 2017 installed mojave 10.14 got now error 10 this is discribed in mr.macintosh as osx not matching ..." BridgeOS Restore Error 10 – The BridgeOS Restore failed! This is most likely...

I still have the problem with the imac pro 2018 i can turn in dfu mode without problems but with the configurator happens the error 06 the last osx i installed was Mojave. is it needfull on the host computer to run mojave as well ? the target is imac pro 2018 mojave i tryed the host with a...

ok, thanks, so i replace the mainboard here as well

hi, got the imac working like it should be but sometimes it has some graphical problems. i didnt found in the forum or anywhere else an issiu like that. so i replaced the mainboard. now, yesterday i got again an imac, same board same problem. so this should be a common issiu, looks like gpu...

Problem solved, there was another crack in the cable, so i connected like in youtube and some jumper wires then from the junction until almost where the cable is coming out of the screen, hell that was a solder trip! :-) ok, but its working now, thanks for help.

Hi, got this A1707 with no backlight, only when open a little bit i can see the display. so I found here in the Rossmann Wiki this by the way the black film it can be more clean and easy removed with fine sandpaper instead of scratching with the knife I tryed that and I have Display now but...

hi, got the imac pro without any sign of life. client told me machine crashes randomly and install from internet ending with error 1008F, but now dont turn on after replacing the power unit the machine turned on but was not possible to install or restore all ends with 1008F so tryed the DFU...

ok, at first now i replaced the display with a 2017 one because of the sleep magnets, thanks @dukefawks and. the audio is not working, dont show any audio device. under the thermal cam, if the audio board is connected the flex cable getting very quick very hot starting on the mainboard...