5V rail problems

[aspseka]

We're considering using Odroid N2s for our (educational) project. Reading through reviews and issues makes us wonder:

Has the cause for the 5V rail problems been identified? Is it handling error? What causes it and can it be avoided?
Can it be repaired after warranty has expired?

(Maybe these new boards are too fragile to be handled a lot?)

Thanks for clarification!

[odroid]

When we made some short circuit conditions on the 40pin header connector, the 5Volt rail could be damaged.
Or, reverse voltage on the DC barrel jack over a minute could cause the problem.
In that case, you can repair it with this instruction if you can solder.
https://wiki.odroid.com/odroid-n2/hardware/repairs

[aspseka]

When we made some short circuit conditions on the 40pin header connector, the 5Volt rail could be damaged.
Or, reverse voltage on the DC barrel jack over a minute could cause the problem.

Thank you! That helps. So maybe one should cover the 40pin header if not needed. We'll think about that.

In that case, you can repair it with this instruction if you can solder.
https://wiki.odroid.com/odroid-n2/hardware/repairs

Are you sure? This speaks about replacing a power switch for 3.3V lane. (And on the boards with 5V problems, 3.3V was usually well, isn't it?)