The electoral court said a roughly 50-minute outage affected only the online display of presidential results.
Brazil’s Superior Electoral Court (TSE) said the pause in publishing first-round results did not affect voting or the count. The failure was limited to the online module showing a national view of the presidential race.
The interruption came on the evening of October 4, after 64.81% of data had been published. The court said a surge in information around 7:14 p.m. caused a processing bottleneck; updates resumed at 8:04 p.m. State-level data continued to appear without interruption.
The TSE said electronic machines continued counting at polling stations. Polling-station bulletins were transmitted, received, processed and posted online. Consolidation continued apart from a brief pause for system checks required by a security protocol.
The court called social-media posts linking the pause to fraud false and said machine-recorded results remained preserved. Its IT department is investigating; the court said technical work began on Sunday evening.
TSE president Kassio Nunes Marques had earlier attributed the delay to congestion from unusually high data traffic. He said the court checks systems after such failures because the cause is not immediately clear. Marques also said no sign of foreign interference had been found and results continued to be published openly and safely.