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N/B Maintenance
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LAN Test Error
Yes
No
Test
OK?
Correct it.
Correct it.
No
Check if BIOS setup is ok.
Re-test
OK?
Board-level
Troubleshooting
Replace
Motherboard
Parts: Signals:
1.Check if the driver is installed properly.
2.Check if the notebook connect with the
LAN properly.
Yes
U2
U4
U20
J5
L26
L28
X1
R36
R51
R37
R52
R34
R87
R92
R93
Check following parts and signals:
+3VS
+3VS_LAN_PLL
+3VS_LAN
TXD+
TXD-
RXIN+
RXIN-
PJTX+
PJTX-
PJRX+
PJRX-
LAN_DATAIO
LAN_DCLK
LAN_MTXC
LAN_MRXC
LAN_MTXD[0..3]
LAN_MRXD[0..3]
LAN_MTXE
LAN_COL
LAN_CRS
LAN_MRXDV
LAN_MRXER
LAN_XI
LAN_XO
R283
R284
RP52
RP6
R59
R54
R53
R74
R413
R46
.
.
.
R49
C85
C87
C74
An error occurs when a LAN device is installed.
8.12 LAN Test Error(1)
MiTac Secret
Confidential Document