So, I tried a nand upgrade on my oled, just for fun. Purchased an SM662PXF BFST (512Gb), desoldered the old one after a nand backup and prod.keys dump, soldered a wire to the DAT0 point and now the picofly blink *== (poor wiring or bad emmc).
Ok, maybe I didn't line it up perfectly, desoldered again, reballed (with 0.3 tin balls, without the stancil, one by one those little mf) this time checked really carefully the emmc was perfectly lined up... again *==.
I went slowly with the heat gun, pre heated a little, then 350C 15% airflow for ~1 minute and then 350C 25% airflow ~ 30 seconds, softly bumped with the tweezers and it camed back in position.
Already inspected the board looking for something burned and everithyng is good looking, resoldered the flex cables just in case, checked every points in diode mode and all values are ok. where did I go wrong?
Ok, maybe I didn't line it up perfectly, desoldered again, reballed (with 0.3 tin balls, without the stancil, one by one those little mf) this time checked really carefully the emmc was perfectly lined up... again *==.
I went slowly with the heat gun, pre heated a little, then 350C 15% airflow for ~1 minute and then 350C 25% airflow ~ 30 seconds, softly bumped with the tweezers and it camed back in position.
Already inspected the board looking for something burned and everithyng is good looking, resoldered the flex cables just in case, checked every points in diode mode and all values are ok. where did I go wrong?
