White screen - SSD upgrade no luck - maybe GPU?
After my mac white screen’d I tried all sorts of recovery, no luck, it just boots to white screen before any recovery tools (disk util etc) show. Diagnostics gave me the error code: 4mot/4/40000003:hdd 1226 - which I researched was most likely the HDD fan.
I took it to the Apple store and they said they think the HDD needs replacing but since it’s a legacy product I’d have to do it myself, I questioned whether the HDD had broken since I’d managed to access it fine in Single User Mode, but I figured they know more than me.. I installed a new SSD upgrade in last night…
I’m still getting a white screen, I’ve tried to run online recovery mode to format and install the OS but after it downloads successfully it just white screens halfway through the apple loading screen, so I can never get to disk utility or installing the OS.
I’m starting to wonder whether it’s my graphics card, but nothing came up in the diagnostics test for my GPU… What else could it be? It doesn’t seem like a broken fan would stop it booting.
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Let's verify if the discreet GPU has failed. Restart your system and press the T key to enter into Target Disk Mode. Your screen should show either a FireWire or Thunderbolt icon floating. If you do you know the intergraded graphics is working!
Its best to use a USB keyboard. Let us know how it goes!
Reference: Mac startup key combinations
由 Dan 完成的
@danj yes I see the icons. Is there anyway to verify the gpu card is working/broken?
由 Ash Lewis 完成的