4-3. PC (ANALOG) No Screen
Symptom
The LED power is on but no picture is displayed on the screen when the D-SUB cable is -
connected
Major
checkpoints
Even though the LED power turns on, the screen is blank when connecting the VGA cable. -
Check the D-sub cable connections. -
Check whether the LVDS cable is connected correctly to the panel. -
Check whether the lamp connector of the panel is connected correctly to the IP board. -
Diagnostics
Main Board Front
CN1005
CN8003
Yes
No
Does led persists green light after
power on?
Check IP board
Yes
No
Does proper 5V appear at pin No.
9 of CN8003?
Check D-sub cable connection
Yes
No
Does proper V-sync ④ and H-sync
⑤ appear at C809 and C808?
Check PC state
No
Does proper clock signals appear
at pin NO.11,12,23,24 of CN1005?
Change main board
because of scaler problem
Yes
Check connection between main
board and panel.
Change Panel.
Caution Make sure to disconnect the power before working on the IP board.
To Next Page
Loading...
