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No change
(LED keep lit)
LED blink (except TC- model)
LED off (TC- model)
LED off (TC- model)
Try the “
LCD Panel
Test Mode”
Check if the Backlight is lit.
(open the back cover and
check from back side)
No lit
Lit
Disconnect FR1 connecter.
Check if voltage
12V(PNL12V) at Test pin
(SRV-12V) in FR board
No
Yes
(12V)
(12V)
Disconnect P3 connecter.
Check if voltage 48/40V at
Test pin (SRV-P40_48V)
In P board before shutdown
Yes
48/40V
48/40V
No
Replace P board
Replace LD board
Replace A board
Replace A board
Replace FR board
Replace LCD Panel
(T-CON part)
Is the power LED situation
changed after pushing the
button for entering Test
Mode?
If entering the test mode,
the Power LED will Blink(except TC- model)
or OFF(TC- model).
the Power LED will Blink(except TC- model)
or OFF(TC- model).
Patterns are
displayed
No Picture
(*) The DC level is different by the LCD panel.
52
Check also the Protection Circuit page about the voltage line.
Try the “FR
Test
Mode”
Replace FR board
Disconnect AP1 connecter.
Check if voltage 68/56V at
Test pin (SRV-VLED1-4)
In AP board before shutdown
Yes
68/56V
68/56V
No
Replace AP board
Troubleshooting for No picture and No OSD
AX900
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