No Display On Screen (Screen Is Black, Led Is Off) - ViewSonic VLCDS26105-2W Service Manual

2. No Display on Screen (Screen is black, LED is off)

YES
-
Check that C202 positive is at 5V. ( FIG 2.)
YES
checjk
Check CN301 pin1
is12V, pin5 is 5V
YES
Inverter failure
ViewSonic Corporation
Is the screen black?
NO
IC100 failure
NO
Check IC400
Pin 114 failures
NO
Check that the voltage level of CN100 is
approximately 12V
YES
FB100, FB101
failure
Confidential – Do Not Copy
NO
F100 or power board failure
VX900-2