6.2.
NO DISPLAY
Check Power
Refer to NO POWER
trouble shoot flow char
ViewSonic Corporation
No
Display
Dark
Check LED Color
region
Green
Press Power key
ON/OFF is OK ?
(See LED is green or
dark.)
Press "1" key if OSD
menu is on display ?
Check X102 Crystal
14.318MHz is
working ?
Check I101
Pin#73,74 data bus
have signal
Check panel Powers
VLCD_3V3
VLCD_12V
correct
Change LCD panel
Amber
Check IO cable is
connect OK ?
Amber & Green
Check X101 Crystal
12MHz is working?
Yes
No
Check uP I104
Reset is Ok ?
Yes
No
Check Keypad
pcb is OK ?
Yes
Check if
Inverter is Ok ?
Yes
No
Change X102
Yes
No
Change I101 LCD
controller IC
Yes
Yes
Confidential - Do Not Copy
31
Yes
Check I/P signal is in
pwr saving state?
No
Check I104 is OK ?
Yes
Change
I106
No
Check Reset circuit
C117,Q101
Check
No
Inverter
Circuit
VE710s/b-2
VA721