2009 iMac woes .
Hi all, hope someone can help me out. My late 2009 iMac went bang a week ago and would do nothing. I replaced the power supply and now it starts with a chime and hdd is chattering away but screen stays black. Cant log in and can’t get to check as it doesn’t show on my MacBook when I try to connect the two. Have tried the cmd option p and r reset with four chimes but no joy. Anyone point me in a useful direction?
iMac 27″, OS X 10.11