Dahua Technology LM49-S400 - How to Clean Product; Troubleshooting

9
How to Clean Product
1. Please wipe dust and other particles off with a clean soft towel.
2. If it is still not clean, please use a neutral cleaner along with the clean soft towel. Wipe dry after
cleaning it.
3. Rubbing or scrapping the housing with fingernails or other hard objects might scratch the
housing.
Troubleshooting
Before consulting service staff, please use the following chart to attempt to diagnose the issue.
Problem
Fix
1
2
3
4
5
6
7
8
9
10
No image or sound
⊕
⊕
⊕
⊕
⊕
⊕
Inferior sound, normal image
⊕
⊕
⊕
⊕
⊕
Inferior image, normal sound
⊕
⊕
⊕
⊕
⊕
⊕
Poor signal
⊕
⊕
⊕
⊕
⊕
Vague image
⊕
⊕
⊕
⊕
Double image
⊕
⊕
⊕
⊕
Interfering lines in image
⊕
⊕
⊕
⊕
Twisty image
⊕
⊕
⊕
⊕
Poor signal
⊕
⊕
⊕
⊕
⊕
⊕
Rung stripe in image
⊕
⊕
Image vertically scrolls
⊕
⊕
⊕
⊕
Inferior color
⊕
⊕
⊕
⊕
⊕
⊕
⊕
⊕
No color
⊕
⊕
⊕
⊕
⊕