(2) Confirm LED indicator
Note: Swapping modules that may be defective with others known to be good is generally an ideal way to
find the module responsible for the problem. A failure symptom is rarely caused by more than one module,
so you will not usually need to replace more than one to correct a particular failure. Whatever main board,
ballast, IR board, power board, lamp module or optical engine are all suitable to check by swapping
modules.
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Pro8400