Samsung CS29Z30SPBXBWT Service Manual page 77

Troubleshooting
2. External Input Diagnosis
It receives the EXT1/EXT2/signal and consists of monitor output (video and audio).
The signal is input to VSP9402 through the port. If no signal input/output is detected, check the following items.
- Power supply : VSP9402(3.3V,1.8V) , CXA2180(5V)
- Check if the input and output jacks are defective.
6-10 Samsung Electronics