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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: drewz21 on February 22, 2009, 05:14:13 AM

Title: Amiga 4000 Display trouble
Post by: drewz21 on February 22, 2009, 05:14:13 AM

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!

Title: Re: Amiga 4000 Display trouble
Post by: Thomas on February 22, 2009, 08:53:58 AM

After power on immediately hold down both mouse buttons so that the early startup menu appears. Choose "boot without startup-sequence". A Shell window with a DOS prompt should appear. At the prompt enter

delete sys:prefs/env-archive/sys/screenmode.prefs

and

rename devs:monitors/#? sys:storage/monitors

and optionally

rename sys:storage/monitors/pal#? devs:monitors

replace pal by ntsc if your 1084 is NTSC. After a reboot the Workbench should load normally, but with only four colors. Run Prefs/ScreenMode to select a more convenient screen mode.

However, OS 3.9 does not look well on a 1084, because it cannot display highres in 1:1 aspect. This would be PAL:Hires Interlaced, but it flickers like hell.

Bye,
Thomas

Title: Re: Amiga 4000 Display trouble
Post by: drewz21 on February 22, 2009, 10:02:03 PM

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

Title: Re: Amiga 4000 Display trouble
Post by: drewz21 on February 23, 2009, 03:21:02 AM

Anyone?  Please.

Title: Re: Amiga 4000 Display trouble
Post by: Bamiga2002 on February 23, 2009, 04:51:23 AM

Does the miggy lockup in the no startup-sequence shell also or after loading OS 3.9?

Title: Re: Amiga 4000 Display trouble
Post by: Thomas on February 23, 2009, 08:16:32 AM

Quote

drewz21 wrote:
Anyone?  Please.

Can you imagine that many people in this forum are living in Europe ? Your post was at 4:21 CET. Most of us were sleeping deeply at this time.

Quote

The Workbench screen comes up fine now. However, the mouse and keyboard stop responding after about 5-6 seconds.

What kind of processor does your Amiga have ? If it is a 68060, then you need to install additional libraries. It's a wonder that it passed SetPatch without a crash.

Does only the Workbench screen come up or do you also see the desktop with its icons ? Does AmiDock load and show ?

You can enter the following commands at the DOS prompt:

rename s:user-startup s:user-startup.disabled

rename sys:wbstartup sys:wbstartup.disabled

This will disable everything which is started automatically after the boot process. But it's only a workaround, you should really find out why it freezes.

Title: Re: Amiga 4000 Display trouble
Post by: drewz21 on February 24, 2009, 01:15:09 AM

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