6.2. NO DISPLAY (Realtek Scaler)
No
Display
Check LED Color
Check Power
region
Refer to NO POWER
trouble shoot flow char
Check IO cable is
connect OK ?
Amber
Dark
Check I/P signal is in
pwr saving state?
Yes
Check X101 Crystal
12MHz is working?
Amber & Green
Check I104 is OK ?
Press Power key
ON/OFF is OK ?
(See LED is green or
dark.)
Check uP I104
Reset is Ok ?
No
Change
I104
Yes
Check Reset circuit
C117,D113,Q101
No
Yes
Press "1" key if OSD
menu is on display ?
Yes
Check Keypad
pcb is OK ?
No
Check if
Inverter is Ok ?
Yes
Check Power
region with no
backlight
No
Yes
Check X102 Crystal
24.576MHz is
working ?
Change X102
No
Check I101
Pin#46,47 data bus
have signal
Change I101 LCD
controller IC
No
Yes
Check panel Powers
VLCD_3V3
VLCD_12V
correct
Yes
Change LCD panel
Yes
No
Green
18
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VA
521
VE510b/s-2
Summary of Contents for ve510b/s-21
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