No Power - Samsung T220HD Service Manual

4. Troubleshooting

4-2. No Power

Diagnostics
Caution Make sure to disconnect the power before working on the IP board.
4-2
CN100
IC103
Does proper 13V appear at pin
No. 2 of CN100? ①
Does proper 5V appear at pin No.
6 and 7 of CN100? ②
Yes
Does proper 13V appear at
C129? ①
Does proper 5V appear at
C108? ②
Yes
Does proper 5V appear at pin No.1
of Q100? ②
Yes
Does proper 1.2V appear at
C135? ③
Yes
Change main board for
MICOM(IC203) problem
C129
C108
IC110
IC203
C135
Main Board Front
No
No
No
No
Q100
Check IP Board
Check related circuit of CN100
Check related circuit of Q100
Check related circuit of IC103