820-00480 not recognize ssd

[yair37]

question mark folder , no water damage, i was try good know ssd but the same.. and do not show on disk utility.
before it was work but if i was shout it out with the charger connected and turn it on it wasn't work! other way it was work ok.
but now it wont work anymore.

 

[2informaticos]

Then should be some problem on the board, or SSD connector.

 

[yair37]

thanks for that, i do have 820-00840 scheme and boardview, im also put good ssd from the same board number (2017) but it not recognized it to.

 

[2informaticos]

First check L8600/02.
Next check input and output levels for U8640.
Also need to know SSD_RESET_L and SSD_CLKREQ_L levels.
SSD_EN goes high?

 

[yair37]

L8600:
1.PP3V3_SSD_FLT -0V
2.PP3V3_S5_SSD_SNS-3.3V

L8602:
1.PPBUS_SSD_FLT 0V
2. PPBUS_G3H_SSD - 13V


U8640:
pp1v8_s5g -1.8v stable
all the rest 1.8v-0v pulsing at the beginning and then 0v.

SSD_RESET_L - 3.3V
SSD_CLKREQ_L - 3.3V
SSD_EN 3.3V

 

[2informaticos]

So both L8600/02 are burnt...