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Old 02-21-2009, 10:14 PM   #1
drewz21
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Default Amiga 4000 Display trouble

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!
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Old 02-22-2009, 01:53 AM   #2
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Default Re: Amiga 4000 Display trouble


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 sysrefs/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,
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Old 02-22-2009, 03:02 PM   #3
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Default Re: Amiga 4000 Display trouble

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
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Old 02-22-2009, 08:21 PM   #4
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Default Re: Amiga 4000 Display trouble

Anyone? Please.
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Old 02-22-2009, 09:51 PM   #5
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Default Re: Amiga 4000 Display trouble

Does the miggy lockup in the no startup-sequence shell also or after loading OS 3.9?
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Old 02-23-2009, 01:16 AM   #6
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Default Re: Amiga 4000 Display trouble


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.

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Old 02-23-2009, 06:15 PM   #7
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Default Re: Amiga 4000 Display trouble

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
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