Sanyo 50 in plasma tv turns on then after a few seconds turns back off

I recently replaced the power supply board in my Sanyo 50 in plasma tv, due to it being completely dead when plugged in. I replaced with a new/refurbished part. It now comes on but very briefly then turns off and the standby light blinks. What does this mean? It almost looks like it's on but real dark .

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Bruce Cassady what is the exact model of your TV?

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Dp 50741 I am not sure how old it is. Replaced power supply board in it with new/remanufactured.

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