OLIMEX© 2017
A20-OLinuXino-LIME2 user's manual
8.4 Frequently asked questions
Q: I power my board, it shows a logo and then nothing happens.
A: This might be due to a number of reasons but it is recommended to try the following:
1. Download latest official image from our wiki (either Android or Debian for SD card), and upload it to
an SD card again. There are instructions how to do it in the other questions below. Try if the board works
now.
2. Check if your power supply provides enough current, try with different/better power supply.
3. Check the USB hub you are using, plug the USB cable directly to the back of your personal computer,
check the USB cable.
4. The board might enter sleep mode very fast (especially if the Android was turned off without the
“Quick Boot” mode being ticked on). Try pressing or holding down the PWR button for a couple of
seconds to wake it up.
Q: What is the operating temperature range of A20-OLinuXino-LIME2?
A: The board works in the commercial temperature range 0+70C.
Q: How long this board will be available?
A: This board will be available
Q: I use LCD_CON for video output. There is some screen flickering under Debian. What could be
the reason?
A: This is usually caused by either a loose cable connection or badly configured script.bin. Double check
if all cables are properly connected. Also check if there is a change in the behavior if you either twist the
cables carefully or press different components at the back.
If the above doesn't fix the flickering problem, edit the script bin parameter lcd_io_cfg0 – make sure that
it is set to = 0×10000000 (1×1 and 7×0).
Q: How do I write the Linux image to a micro SD card to use with my A20 board?
A: To write a Linux image to an SD card under Windows we use Win32 Disk Imager:
Download Win32 Disk Imager software
Insert card
Start program
Select file
Click "write"
To write a Linux image to an SD card under Linux:
For instance you have an image with the file name of "debian_2g.img". It would be downloaded to the
SD card connected to a Linux machine using one of the following commands:
# dd bs=4M oflag=sync if=debian_2g.img of=/dev/sdX
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