Pc (Analog) No Screen - Samsung T240HD Service Manual

4-3. PC (ANALOG) No Screen

Diagnostics
Caution Make sure to disconnect the power before working on the IP board.
C509, C510
Does led persists green light after
power on?
Yes
Does proper 5V appear at pin No.
9 of CN500?
Yes
Does proper V and H-sync appear
at C510 and C509? ④, ⑤
Yes
Does proper clock signals appear
at pin NO.11,12,23,24 of CN300?
Yes
Check connection between main
board and panel.
Change Panel.
CN300
CN500
Main Board Front
No
No
No
No
4. Troubleshooting
Check IP board
Check D-sub cable connection
Check PC state
Change main board
because of scaler problem
4-5