Troubleshooting Tips - Siemens Prisma 3T User Manual

6. Prescription lenses are available if needed – they range -6 to +6 and are kept in the
cabinet above the participant lockers

Troubleshooting Tips

A. The LCD is not displaying the laptop screen, but you can see the desktop computer screen
1. Select "L" on the black LCD switch box
2. If the switch box will not let you select "L" that means the laptop is not plugged in
properly
3. Check the HDMI connection cable
4. If you are using a mini displayport adapter ensure it is not plugged in upside down
B. The LCD is not displaying the laptop or desktop computer
1. Make sure you turned on the black LCD switch box
2. Make sure the connections at the back of the LCD box are plugged in and not loose –
there should be 4 cables plugged in
3. Reboot the black LCD switch box
 Turn off the power - wait 5 sec then turn it back on
 Use the select button to choose "D" or "L"
4. If you are using the desktop, switch to the BMC laptop to see if it is working
 If the laptop is working then check the HDMI cable in the back of the dell desktop
tower
 please be careful not to unplug anything
 do not pull the tower out, but rather look behind it in its current position to
5. If you are using a laptop, switch to the BMC desktop to see if it is working
 If the desktop is working then check the HDMI connection on the laptop (see A
above)
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avoid unplugging cables
Revision Date: 3/13/2019