> Wait, then why don't they just switch over each component in turn? The "divide and conquer" debugging strategy. It's better to understand the problem than to

> Wait, then why don't they just switch over each component in turn? The "divide and conquer" debugging strategy. It's better to understand the problem than to just start changing stuff hoping you find the right thing even systematically. There's not a huge rush to fix this since it's the payload computer and the telescope is still being maintained by other systems. A lot bad could happen, if the switching system is flakey you could maybe get stuck in a bad system, or if there's a number of faults you might damage one of the backups. Without the shuttle there's not a plan to service it any more so why take the risk rushing through to the most simplistic debugging method?