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I tried to get a ISO and tried this with VM VirtualBox but I do some wrong it dont want to start from the "disk"

i tried it with HighSierra beacuse i have an installation stick but start from external SSD with HighSiera shows the prohibition sign. Installation USB with High Sierra the same

is this anyhow possible without Paralells? thanks a lot

I checked now all landing pads from the 2 nands in diode mode, they are all with the values in the openboard data now i soldered the original back, run dfu revive, in this moment when it will write on the nands it is restarting (can see in amp meter 5V 250mA then load the software unzip the...

now i got a good 820-2020 board i soldered the 2tb NANDs out from the problem board and directly in the good board. nothing changed, all procedures the same in dfu comes the progress bar and seems all good so what the hell is in the board. is it possible that the nand power is bad from one of...

i swapped the nands and chose the 2TB version. i have done this many times but with this device i always get 4013 as an error in the dfu. the position is correct, i have checked this by desoldering and reading, the content is also exactly the same as the source file. Then I soldered the...

so in such a case, only theretical, is it additional needfull to replace the cpu?

ok, yes right. By the way. I have the same model where the client needs the data. if i transplant the ssd in same position from the (client with data) to this board. after this brisge os (revive) will i can read the data out? can have this sucess?

using restore i get the Error 0xFAD 4013, found theat: 4013 / 6 - errors indicate bad NAND Sysconfig or wrong position. that means for me i have to solder out the nands and flash with p13 the firmware, solder back and try then with DFU to flash the bridge OS is that logical for you?

using revive

got this A2338 with the exclamation mark after the start So i forced it in to the DFU mode 1. download system ok 2. copy ok 3. extrract ok 4. install ok and ends in error tryed rvieve and restore but in the end got Error 2006 0x7d6 (failed to restore device in recovery mode) the cable is a...

cant find any difference in the usb-c area, checked in diode mode and with mac usbc&edp meter checked with known good battery and out of the case and in the case, stucks on 5V all the time i replaced UF260 with the good working board but still the same, the good working board works with this...

yes, and i found out that the SSD was not NVMe, it was a PCI-E AHCI SSD

replaced now with the 4771 and a SATA SSD, that is working

found that probably the efi dont support the 4790 only the 4771 there is no way to edit the efi that way?

820-3481 i checked the 820-3299 because i think no one has the 3481 J4500 has only SATA_SSD lines. so thats the reason isnt it? but may be the 3481 accept nvme? and the 820-3299 has in the schematic a 1155 socket but my board 820-3481 has a 1150 socket. in the socket is the SR14D i5-4670 but...

hi got this device with liquid damage. first accu was not good, with other one it turned on but dont recogniced the charger after that i found liquid damage around U5200 and around F5200 i cleaned that up, found i2c_smc_pwr_3V3_scl had to high value in diode mode, replaced UD201, then scl and...

Hi, i wanted to uügrade this imac but there faces me some problems. 1. upgrade from i5 CPU to i7 4.0Ghz (4790K) insert the i7 there i have only 1. and 2nd led after a wilhle second turns off and first is only on then second turns on again and so on, no dong, nothing insertet the i5 all is...

Hi, got this imac with now signs of life, no led nothing, replaced with a known good power unit, nothing. found short in PP12V_ACDC pin 3 and 4 J6900 figured out, that Q8450 is blown, replaced it and the short is gone now already the first LED is coming up but after pressing power the LED turns...

ok got he new chips H9CCNNNCLTMLARNUD with that all working good. so problem solved