Context
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Razer Blade 14 (2021, RZ09-0370; / RTX 3070).
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Full teardown to repaste / clean.
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Re-assembled without visible damage, but now:
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Windows still shows the battery (percentage looks correct).
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AC LED is on, percentage never increases.
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Laptop shuts off instantly when the AC adapter is pulled.
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Swapped in a brand-new battery → identical behaviour.
It was working well before the unmount. I did it very carefully, I don’t understand what is going on.
Measurements
| Test point | Voltage (battery connected, AC unplugged) |
|---|---|
| Down-stream pad of Fuse “X” (after battery connector) | ≈ 15 V |
| Every pin on the two “30030L” 8-pin devices (battery FET pair) | 0 V |
| R005 vertical shunt (battery current sense) | 0 V |
| R005 horizontal shunt (charger current sense) | 0 V (expected with charger unplugged) |
Ground probe is screwed to a chassis screw; readings repeated several times.
What I’ve Tried
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Visual inspection: battery cable, Fuse X, traces all look fine.
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Hard EC reset
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Disconnect battery and charger.
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Unplug CMOS coin cell.
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Hold POWER 30 s.
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Re-attach CMOS cell, then battery → no change, FETs still show 0 V.
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Updated BIOS and EC with official USB package – no effect.
Questions / Possible Causes
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Ship-mode stuck?
– Why doesn’t the drain of the first FET pick up the 15 V that’s on Fuse X? (I believe I’m on the correct pins: the two 30030L chips just left of the vertical R005.) -
Blown battery FETs?
– Full part number should be FDMC8030L / AON6030?
– If one is bad, do I need to replace both devices? -
Anyone have a boardview / schematic for the Blade 14 R3 to confirm the exact role of these 30030Ls?
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Any other angles (DC3901x charge controller, hidden trace damage, etc.) I should check?
Some pictures :
Maybe I can’t identify the mosfets..
