Unfortunately, to protect their proprietary designs, Xantrex does not provide parts or schematics except to their factory authorized service network. Assuming it is not still under warranty that would be voided by removing the cover, you might be able to see any obvious damage and procure the necessary repair parts from a third party, but that might be a lot of trouble to track down without any guarantee that it would actually fix the problem. If the unit cannot be uninstalled and/or brought to a service center, some reps do make "house calls", albeit for a fee.
Answers & Comments
My 458 will not allow 110 volt power in my boat..the 12 volt circets work fine ..is there a switch in the 458 that might be stuck??
Unfortunately, to protect their proprietary designs, Xantrex does not provide parts or schematics except to their factory authorized service network. Assuming it is not still under warranty that would be voided by removing the cover, you might be able to see any obvious damage and procure the necessary repair parts from a third party, but that might be a lot of trouble to track down without any guarantee that it would actually fix the problem. If the unit cannot be uninstalled and/or brought to a service center, some reps do make "house calls", albeit for a fee.