I suspect that J5 may be a shorting point to place the SSD in "safe mode". I would first test for continuity between the round pad and the R/B pin of the NAND array. Also check whether the square pad is grounded.
For reference ...
ispPAC-POWR607, Lattice Semiconductor, Programmable Power Supply Supervisor, Reset Generator and Watchdog Timer:
http://www.latticesemi.com/~/media/LatticeSemi/Documents/DataSheets/ispPAC/ispPAC-POWR607DataSheet.pdf?document_id=21806EN6337QI, Enpirion, 3A Voltage Mode Synchronous Buck PWM DC-DC Converter with Integrated Inductor:
https://www.altera.com/content/dam/altera-www/global/en_US/pdfs/literature/ds/en6337qi_05800.pdfAT24C256C, Atmel, marking 2ECL, I2C Serial EEPROM, 32K x 8, 1.7V - 5.5V:
http://www.atmel.com/images/atmel-8568-seeprom-at24c256c-datasheet.pdfIRF9910, International Rectifier, dual n-channel MOSFET, SO-8, 20V, 10A/12A, marking F9910:
http://www.farnell.com/datasheets/172972.pdfEP53A8HQI, Enpirion, marking AMxx, 1A PowerSoC, Voltage Mode Synchronous PWM Buck w/ Integrated Inductor, 16-pin QFN, Vin = 2.4 - 5.5V:
https://www.altera.co.jp/content/dam/altera-www/global/en_US/pdfs/literature/ds/ep53a8lqi_03651.pdf