On Thursday, May 10th, 2018, SpaceX attempted a launch of the first Falcon 9 block V rocket carrying Bangabandhu-1 however the countdown was stopped at t-58 seconds and the launch was scrubbed for 24 hours. Do we know what caused the launch abort sequence to be initiated?
The Flight Computer checked everything, and noticed an abort signal in a piece of ground equipment, due to a bad state from a prior test. They have fixed the problem to not happen again.
This is from the livestream of the second launch attempt.