MiTAC 7521 N - Vga Controller Failure Lcd no Display

97
7521
7521
N/B MAINTENANCE
N/B MAINTENANCE
U22
SIS 630
U2
DS90C363MTD
R[2~7]_301
G[2~7]_301
B[2~7]_301
FA6,FA8,FA10
FA7,FA9,FA11
RP7,RP9,RP11
RP8,RP10,RP12
VBHSYNC
VBVSYNC
VBBLANK#
VGCLK
L528
L51
L529
L531
R526
R18
R11
R525
22
23
25
26
TXCLKOUT+
TXCLKOUT-
TXOUT0+
TXOUT0-
TXOUT1+
TXOUT1-
TXOUT2+
TXOUT2-
32
33
40
41
38
39
34
35
27
VBCLK
7
11
16
20
8
12
15
19
1 23
5 678
4
S
G
D
1
2
D
S
G
FPVCC
R5
+5V
+12V
R8
Q3
+3V
Q4
L4
ENABKL_VGA#
SW1
ENABKL_VGA
U12
H8
BLADJ
4
45
1
LID_OPEN#
24
LCD
+5V
L15
2
3
J1
+3V
R190
Q16
Q20
Q5
+3V
+3V
R19
R196
7.3. VGA CONTROLLER FAILURE LCD NO DISPLAY
There is no display or picture abnormal on LCD.
J2
LCD COVER SW
L537 R623