iMac Unresponsive at startup but still able to move cursor
I do hope someone can help.
I'm currently working on an iMac late 2009.
The issue is after startup it is unresponsive i loads the OS up fine & it brings up the desktop i can see my cursor & i can move it around all good so far problem i have is for between 5 - 10 mins i cannot click or select anything.
If i click on multiple things while i wait for it to sort itself out nothing happens but when it starts to work everything i clicked on all starts to open all at once.
The original issue when it came to me it was blue screening but if you pressed the power button to make it sleep then pressed it again the log in window appeared but as described you couldn't do anything for 5 - 10 mins
I changed it to automatic log in & this resolved the blue screen as it went straight to the desktop but still it wouldn't let you select or click on anything.
Ok things i have tried so far i have wiped & reinstalled the OS to check if it was a software issue but even then it still took the 5 - 10 mins to sort it self out & that was booting from a DVD or USB stick.
I have also tried to run the Apple Service Diagnostic which kept failing on sensors but it wouldn't say which sensor.
As it was blue screening i then thought could it be a video card issue but i have just replaced that & i'm still having the same issue.
Any help or suggestions would be greatly appreciated .
Is this a good question?