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Voltages of SSD Side of J9600
PPVIN_2V7NAND_LB is 13V
PP5V_S4_P2V7NAND_LB is 0V
SSD_BOOT_LB_L is 1.8V
SD_PWR_EN_LB_L is 0V
STORAGE_LB_EN is 3.3V
SSD_RESET_LB_L is 3.3V
SSD_PCIE_CLKREQ_LB_L is 3.3V
PCIE_SSD_D2R_LB_P<0> is 0V
PCIE_SSD_D2R_LB_N<0> is 0V
PCIE_SSD_R2D_LB_C_P<0> is 0.8V...
Continuity Left/Right Means
Resistance across pins on left and right lines. 45/46.
45/46 is 7.4M Ohms
43/44 is 6M Ohms
1/2 is 400k Ohms
4/5 is 1.7M OHms
7/8 is 100 k Ohms
PP3v3_g3h was shorted. Injected voltage and remove the cap.
Now its flashing the question mark folder.
R9350 and adjacent are okay. Checked every other thing in repair.wiki.
How can I ensure dead NAND?
Removed the WIFI IC. Short gone. Machine boots now. I get chime and external video but no internal image or backlight .
NO IMAGE and NO BACKLIGHT.
UP701 was burnt and was replaced . I had to reconstruct trace for EDP_PANEL_PWR_EN.
I get 3.3V there very briefly before it goes down to 0V.
Tried...
Device came in with intermittent shutdown and not charging issues.
Found R1955 /R1650 / R0620 all corroded. Replaced them. Now the shutdown issue is gone but the charging issue remains.
Device shows battery charging when charge connected but the percentage will not increase. Restart the machine...
Did a thermal scan. UE501 was heating up. SMC_FAN line shorted. Replaced UE501 - short gone.
UP701 was burst. Replaced. Had to reconstruct a trace as well. But its still the same.
Did thermal scanning again now UP710 heating up.