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8355 N/B MAINTENANCE
8355 N/B MAINTENANCE
132
8.4 AGP Controller Failure LCD No Display
Symptom:
There is no display on LCD although power-on-self-test is passed.
J2
P11
TXCLK+
TXCLK-
TXOUT[0:3]+
TXOUT[0:3]-
TX2OUT[0:3]+
TX2OUT[0:3]-
TX2CLK+
TX2CLK-
5,6,7,8
11
13
10
12
17,23,29,35
19,25,31,37
16,22,28,34
18,24,30,36
R503
1M
+PANEL_VDD
L46
120Z/100M
1,2,3
+3V
F501
FUSE_1206
ENABL_VGA
BLADJ
J3
45
U511
H8
1
4
1
L39
120Z
H8_ENABKL
57
P23
P24
C687
0.1U
L42
120Z
ENABKL
+3V
2
3
+5V
R817
10K
To
Inverter
Board
Q518
DTC144TKA
P5
AGP_AD[0:31]
LCD
LCD
U506
North Bridge
VT8385
P5
U16
ATI M10
P7
AGP_SBA[0:7]
AGP_CBE[0:3]
AGP_ST[0:2]
AGP_RESET#
AGP_REQ#
AGP_GNT#
AGP_PAR
AGP_STOP#
AGP_DEVSEL#
AGP_TRDY#
AGP_IRDY#
AGP_FRAME#
AGP_WBF#
AGP_RBF#
AGP_ADSTB[0:1]
AGP_ADSTB[0:1]#
U9
ICS950403
P6
R91 22
66M_AGP
C211
22P
D503
RLS4148
+3V
R190
10K
2
1
3
7
6
5
8
4
R504
10K
C505
0.22U
Q503
SI4835DY
R586
0
ENAVDD
Q501
2N7002
C39
1U
PANEL_ID[0:3]
X1
X2
X3
27MHz
R139
1M
C291
22P
C290
22P
R404
0
R403
0
R338
1K
R595
0