No HDMI signal and target disk mode does not work after screen broken
I bought this MacBook Retina 2015 with a broken screen. I can see the backlight come on but the screen is broken. However I connect a Satechi USB-C mulitadapter and get no HDMI signal. This adapter works fine on another similar machine. I can hear it recognize charging when I plug in a power adapter. But I am also not able to get the mac in Target Disk Mode. I can see traces of the bouncing USB logo so it must be in TD mode. But I need to get to the disk or get a video signal in some way to check the mac.
Any ideas why USB-C is not working with HDMI adapter or TD mode but seems to charge?
It seems that all USB-C MacBook systems support TDM with these 2 cables:
- USB-C to USB-A. It must be the USB-3 and not USB-2 version cable. You can see if a cable is USB-3 by the 5 pins inside the connector. USB-2 only has 4 pins.
Here's Apples cable: Belkin USB-A to USB-C Cable (USB 3.1) I managed to get a cheap one that works fine.
- USB-C to USB-C cable. Apple calls it Thunderbolt 3 but as long as it is "data cable" and not the supplied "charging cable" it should work fine.
Here's Apples cable: Thunderbolt 3 (USB‑C) Cable (0.8 m). I managed to get a cheap one at the local gadget shop that worked fine.
I tested both these cables with TDM and the working MacBook 12" Retina. Works like a charm. But this MacBook has a broken screen and does not work with TDM. I guess I will have to get a new screen and will update!