I already sent this to OP; I needed to verify I could post it online. I didn't know this, but if you connect the power connector of the trailing cable incorrectly, you can inadvertently fry the carriage PCA and the Main PCA (the Sausalito board.) The image is cut off but went on to say the result is the display lighting up but no other progress on boot, with the green LED by the display blinking.
Not saying this is OP's issue, of course! But I hope this helps others avoid this mistake.
Kiran
incorrect trailing power.jpg
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