THIS!!
unless you filled inside the case tight, the gpu has likely been dancing around, start basics
Reseat connections and test
look for POST and BEEP codes on the motherboard to give you some kind of indication what is occuring if no video output.
Again, you cannot acknowledge that you broke the rule and dispute it.
You either did break the rule, or you think you did not break the rule or broke the rule in the way the ban reason has been wrote
You cannot dispute a punishment because you feel the length was unjust, this must be done via a staff complaint instead.
Are you disputing the ban length?
As stated above not a bug.
Rules still apply when sitting so its easy to gunpoint people out of seats ect to prevent abuse, but if abused make a report about it.