ViewSonic ViewPanel VP180m User Manual page 18

For the most expedient answer to your question, do the following:
1. Check Troubleshooting (on the previous page).
2. For assistance contact your reseller.
3. For further assistance see the contact information listed below.
If contact information for your country or region is not listed below, ask your
reseller to refer you to a service center.
You will need to provide the serial number (on the back of the product).
NOTE:
ViewSonic VP180m 17