functional one.
（
3
）
System is out of date or the firmware program of bootloader was changed
when updating system
：
Solution
：
You will need to update system when you first start system. Input
below commands before updating:
sudo apt-mark hold raspberrypi-bootloader
Make sure bootloader won’t be changed and then input below commands:
sudo apt-get upgrade
sudo apt-get update
Update system in the right way and restart then reinstall drivers.
（
4
）
Drivers are not installed
：
3.5 inch screen works with the configured Raspbian system but not on the
official Raspbian system.
Solution
：
Please refer Chapter2.2 and install drivers.
（
5
）
Drivers are not compatible with system
：
3.5 inch screen works with the configured Raspbian system. After installing
drivers for official Raspbian system the screen is still white/blank.
Solution
：
Please install the latest version of Raspbian system and contact us at
. We will inform you once the drivers is updated and show you
how to install drivers.
（
6
）
Quality issue of screen
：
Excluding reason
（
1
）
to
（
5
）
then you might have received a defective scree.
Solution: Please send us an email with your order ID at
tell us where you bought this screen. We will arrange a replacement and send it to
you for free very soon.
