I realise that the OP is not interested in performing any measurements, but others might be, so here is my take on the circuit.
I would measure the voltages at V1, V2 and V3. Also measure the voltages at the 5 inductors on the underside. The latter would be associated with the internal PWM circuitry in the flash controller.
I'm guessing that the 2-pin location is the shorting point for safe mode, but I would be careful. If all the supplies are OK, and the SSD does not enter safe mode, then I would check the crystal. I would also check whether the controller or NAND are hot to touch.
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- regs2.jpg (183.22 KiB) Viewed 7130 times
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- safe_mode.jpg (70.61 KiB) Viewed 7130 times
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- controller_PWM_regs_underside.jpg (93.02 KiB) Viewed 7130 times