Amiga 4000 Display trouble

[drewz21]

I've got an A4000D and I put an 80GB hard drive in it that I purchased from AmigaKit.com pre-formatted and installed with AOS 3.9.  When I boot it up attached to my 1084S monitor, the image is stable for about 3-5 seconds and then it starts flickering and I cannot get any response from keyboard or mouse.

Any ideas or suggestions?

Thanks!

[drewz21]

Thanks so much!  That fixed the display problem.  The Workbench screen comes up fine now.  However, the mouse and keyboard stop responding after about 5-6 seconds.

Any other suggestions?

Thanks.
Drew

[drewz21]

Anyone?  Please.

[drewz21]

Very sorry.  Didn't mean to be dis-courteous.  It is a pretty much stock A4000D.  It does not freeze up if I bypass the startup.  Only when the full OS loads.  I will try your other suggestions Thomas.

Hope you sleep/slept good.   :-)

Thanks,
Drew