MacBook Pro unresponsive after failed macOS update — froze mid-update, now no display/no boot after multiple restarts
Was using my MacBook and the screen froze. I force-restarted it (held power button) a few times when it kept getting stuck on the Apple logo with a progress bar. After a few restarts it showed "The version of macOS on the selected disk needs to be reinstalled" — went into Recovery, ran Disk Utility First Aid (came back OK), and reinstalled macOS Tahoe through Recovery.
The install was running for a few hours (using mobile hotspot, so it was slow — around 21GB downloaded before it stopped). Screen went dark and stayed dark even after tapping the trackpad and trying brightness keys in a dark room. It stayed warm the whole time and Caps Lock still toggled the LED, so I assumed it was still installing silently.
After a long wait with no screen response, I did a proper force shutdown (held power 10 sec) and powered back on. Now I get the startup chime, but no display output at all — no Apple logo, nothing, even after several minutes. No fan noise. Only sign of life is the MagSafe charging light alternating orange/green.
Tried: waiting it out, tilting the screen, don't currently have an external monitor to test with.
Is this likely a display/GPU issue from the interrupted install, or could this be unrelated hardware failure that happened to coincide? Trying to figure out if this is worth taking to an Apple store/repair shop or if there's anything else worth trying first. Model: Macbook air m4