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It did help—the machine is passing the Apple logo now but gets stuck on the login screen, so it looks like the issue is with the BIOS. Once you get a chance, could you please clean ME ? Thank you!

was this my original bios ? now is passing the apple logo but getting stuck when I am trying sign in to system.

its booting to system now with this bios

Hi, Could someone help and clean ME region on this bios file pls. Machine is getting stuck on apple logo not booting with another ssd or whoosh ssd to any OS usb disk but booting to windows life USB, getting stuck on "end random seed"...

Any ideas why this machine is displaying this test screen ?

its test like from this link going over and over again :

I did not tired a screen as once machine boot and show to "test" it look correct. Also while doing this test showing me a normal display on external screen

Hi everyone, Does anyone seen machine in mode like this ? `I haver tried battery disconnecting - no luck. The screen was replaced recently on it I have swap IC's as its the A2442 it was working fine for a few months...

Hi everyone, I was wondering could someone advise what would be best software for testing MacBook after repair. I have recently get a few customers telling laptop is getting to hot. On windows laptops I am running benchmark test on aida64 100% cpu/gpu usage shows temp in real time . Is...

Any more ideas?

Hi I have tried the external switch method and I am getting DFU this way

Asked cusomter he said machine just did not power on one day its some company machine so hard to say even for them. I did tried but did not show in DFU for me

Get this machine not powering on, no sign of liquid etc. board looks clean. after connecting meter it switch to 20v 0.47A than jump 0.25A . Under thermal camera I can see U3900 warm up to around 40C, CPU gets power CPUcore_SW1 for a 10s and then current meter goes to 20V 0 A . Any idea what...

Thanks for informing about OpenBoardView, the new version supports those files. I have checked the 3V3_S2_WLBT its present . PP1V8_S2 present

Hi I have received this machine after liquid damage. The damages was on the side I/o board I replace it but there is still no sound or wifi (wifi is greyed out ) board checked under microscope it is clean no corrosion. Any idea on this ? Do you have a .brd for this machine that will work on...

I have put empty Soc ROM machine is not powering on, is this normal ? I have seen that it is possible to buy a programmed do you have any stock bin I could program this chip with . thanks

Hi everyone, I get MacBook which is showing me error 2003F or 2100F when I am trying to load internet recovery. Tried reinstall in DFU but it is cutting on middle of installation. Do you have any idea how to resolve this issue ? Thanks

Hi thanks for response, What is SoC ROM? I cant see this setting in Apple Configurator. I didn't test with ethernet connection as I don't have the LAN adapter

Basically when selected Restore or review in DFU, OS restore is going to blank screen at around 60% and not finishing restore or review. We've tried to remove secure boot (instal from USB stick ) but there is no admin password as system has been removed by customer; when we try procedure than...

I have a MB pro a1989 with the following issue: -will not install system -will only boot to internet recovery, can get it into usb boot and recovery mode from there -gives error "-2001f" on internet recovery or install from usb -restore and revive in DFU mode cuts off around 60% -"recovery is...