2019 Macbook T2 boot up issues

If you can't get Recovery mode working, you can't do anything with that Mac by itself.

With the passwords and another Mac, already running Apple Configurator 2:

https://apps.apple.com/app/apple-configurator-2/id1037126344

... you may be able to use T2 Recovery:

Revive or restore an Intel-based Mac with Apple Configurator 2 - Apple Support

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everyday_computer_repairs wrote:

I have a 2019 MacBook Pro with T2 chip. I have been unsuccessful in booting this device to an OS no matter what I try. The steps I have done.

Attempted internet recovery:1. MacBook loads to globe, progress bar progresses then MacBook has a loud fan noise then shuts off. (Tested multiple times with different ways of getting to internet recovery, all same result)

Attempted to boot to a bootable drive1. : Loaded up bootable USB options but when you select a source the MacBook forces you to use internet recovery which fails as mentioned above.

Reset firmware through DFU: 1. I have attempted both revive and restore in DFU mode which the MacBook appears to have taken but still continues the same issues mentioned above.

Target mode: 1. To make sure the device was not having ssd issues, I checked the disk through target disk and was able to load, partition and manipulate the drive as expected. I loaded a bootable OS to the SSD on the MacBook but I am still forced into internet recovery mode when I attempt to boot from it.

Reset PRAM/SMC:1. I have done all of the resets I know on this MacBook but still no avail.

I am puzzled as I have attempted all known workarounds. Any suggestions as to how to resolve this issue? My theory is that it is an issue with the T2 chip not allowing bootable media but I am unable to get into recovery mode to turn this off in the security settings.

Learn how to get your Mac fixed and how much it will cost.

https://support.apple.com/mac/repair/service

Get your Mac ready for service - Apple Support https://support.apple.com/en-us/HT209095

In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment

Make an appointment for a "hardware issue"—

https://www.apple.com/retail/geniusbar/

Outside the USA

https://locate.apple.com/country

From iOS device using the app to make a online Genius Bar appointment is easy:

https://itunes.apple.com/us/app/apple-support/id1130498044?mt=8

“Mac notebook, contact us and we'll send you a box you can use to ship it to an Apple Repair Center. We'll return your repaired product to you as quickly as possible. Depending on where you get service, you might be able to check the status of your repair online.” Start a service request https://support.apple.com/mac/repair/service

Call Customer Support (800) MY–APPLE (800–692–7753)

or on line https://getsupport.apple.com/

or call AppleCare Support at 1-800-APLCARE (800-275-2273)

Outside the USA—Contact Apple for support and service by phone

See a list of Apple phone numbers around the world.

https://support.apple.com/en-us/HT201232

The classic way to make progress from here is to substitute "known good" components to isolate the cause of the failure, OR...

... throw yourself at the mercy of Apple support and have them "make it right" for a flat fee.

Get Support

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In the US, eBay sellers are offering questionable failed computers at bargain prices. Buy a handful and you may end up with a somewhat smaller number of working computers when done.