Vga Controller Failure Lcd No Display - Prestigio CAVALIERE 141 Technical & Service Manual

Prestigio Cavaliere 141

8.4 VGA Controller Failure LCD No Display

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