Black Screen At Startup, Chimes OK, External screen OK
Hello. I replaced the power supply and hard drive to iMac recently. After the fix, the iMac boots to a black screen. I can here the chimes and if I hook up an external monitor, the screen shows on it. I reset PRAM. I don't see a faint image on the iMac, however. Any troubleshooting steps anyone can recommend or maybe you know the issue? Thanks in advance.
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