iMac screen is black

I just replaced my power supply on my iMac 21.5" EMC 2308.

Now when I turn on the power I just get the startup tune but the screen is black (partially lit) nothing else.

Desperate to have this fixed. Thank you.

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Can you explain why you replaced the power supply and is the system reacting differently now.


Have your checked if your screen is connected to the power supply?


What are the diagnostic LEDs telling you?


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