I’ve always wanted to do one of these! A 6 plus, would not restore giving error 9. Measurement of the data lines between the CPU and the anti-rollback EEPROM showed failure in the trace going under the CPU.
![](https://sp-ao.shortpixel.ai/client/q_lossless,ret_img,w_527,h_572/https://hiphonerepair.com/wp-content/uploads/2019/04/Capture.jpg)
Rather than pull the CPU and run a wire underneath some brilliant soul discovered you can get to that signal by digging down from the TOP of the cpu, through the Sdram chip. Then you just run a jumper to the signal on the backside. Here’s how it went:
![](https://i2.wp.com/hiphonerepair.com/wp-content/uploads/2019/04/IMG_2131.jpeg?fit=1024%2C768&ssl=1)
And now it restores…
No More Error 9!