| Citation : 
 
 D1601 - Red LED On, shows critical temperature fault
 D1602 - Red LED On, shows External power connector A was removed
 
 D1603 - Red LED On, shows External power connector B was removed
 
 D1604 - Red LED On, shows critical Core power fault ( this was markedas D601 in the mail but as it didn't follow the pattern of 1601, 2, 3etc I think he mistyped it UNLESS there is such a numbered LED on thecard - in which case ignore my ammendum ).
 
 
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