Dvi No Screen - Samsung T220HD Service Manual

4. Troubleshooting

4-4. DVI No Screen

Diagnostics
Caution Make sure to disconnect the power before working on the IP board.
4-8
CN500
CN501
Does led persists green light after
power on?
Yes
Dose proper 5V appear at pin No.
14 of CN501?
Yes
Does proper signals appear at
pin No.6(SCL) ⑥ and No.7(SDA)
⑦ of CN501?
Yes
Does proper clock signals
appear at pin NO.38 and NO.39
of IC600?
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
IC600
Main Board Front
No
No
No
No
No
Check IP board
Check DVI cable connection
Check PC state
Change IC600
Change main board
because of scaler problem