Color absent
or wrong color
No
Yes
Yes
Segment for
specific color
Scaler O/P short or
open
No
TTL O/P short or open
Noise at certain scale for
more than one color
Use 32 or 64 gray scale
Use 256 gray scale with
R/G/B white
Shadowing
Yes
No
(1) VGA cable quality
bad
(2) Power(3.3V/2.5V)
have big noise
Noisy
Measure R/G/B input
use block pattern
Check VGA cable
(1)Too long?
(2)Quality no good?
C
Picture Abnormal but Stable & size correct
12
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VG511s
VG512s