The 80 year old Class 483s have served the Isle of Wight since 1990. The line will be closed for an upgrade for three months with a bus replacement service.
The man, who hasn't been named, was taken to hospital after the accident at 1.15am but died from his injuries
Computer problems have stopped passengers buying tickets for the Southampton to Isle of Wight route. Red Funnel says there's no evidence to suggest a data leak.