106
Prestigio Cavaliere 141
Technical Service Manual
8.4 VGA Controller Failure LCD No Display
Symptom:
There is no display on LCD although power-on-self-test is passed.
P
14
TXOUTCLK1-
TX
TXOUT11-
TXOUT12-
TXOUT10-
U503
LVDS Interface
SiS301LV
P
10
U505
North Bridge
SiS650
+3V
RP1
10K*4
5
6
7
8
1
2
3
4
PANEL_ID2
PANEL_ID1
PANEL_ID0
19
20
18
5
7
12
14
11
13
6
8
TXOUTCLK1-
TX
TXOUT11-
TXOUT12-
TXOUT10-
+12V
R3
470K
+3V_LCDVCC
Q1
NDS9410
R1
120Z/100M
R2
10K
1,2
+3V
FPVCC
2
3
1
6
7
8
5
4
1
3
2
F1
3216FF-1A
3
2
1
PCIRST# From SB
ENBL
BLADJ
45
R11
100
U13
H8
3
4
1
+3V
L3
120Z
H8_ENBL
94
P
26
P
24
D1
BAW56
C199
0.1U
L1
120Z
VGA_ENABLE
2
3
D2
BAW56
3
2
1
+3V
R8
1K
Q3
DTC144TKA
VBHCLK
VBDE
VBCLK
VBCTRL0
VBCTRL1
VAD[0:11]
VBD[0:11]
P
5
R53 0
R520 22
VAHSYNC
VAVSYNC
VBHSYNC
VBVSYNC
R49 22
R55 22
R535 22
R48 22
VAGCLK
VBGCLK
R47 0
VBCAD
R541 10
R538 10
LCD
LCD
J2
Q2
DTC144TKA
J1
To
Inverter
Board