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A10001986
1986

Posted Tue Apr 30, 2019 5:48 am

I think that "red" is not intentionally red but caused by the defective Denise, who is, in fact, in charge of video output.

Intentional "red" is only used when the checksum of the Kickstart ROM is wrong.

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Gorack

Posted Thu Jul 23, 2020 7:14 pm

I would also like to add (discovered through experience) that a WHITE screen could indicate there is something wrong with the interrupt system. Interrupts are multiplexed by Paula before being sent to the CPU so check Paula and the socket.
The interrupts can easily checked with DIAGROM.

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fxgogo
Twickenham , U.K.

Posted Fri Jul 24, 2020 6:25 am

Super post. This is a goto trouble shooter. Thanks.

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Dasfaust
Burkburnett, TX
YouTube

Posted Sun Jan 23, 2022 12:14 am

Thank you for this information, it helped me fix my Amiga 1000

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JRZ

Posted Mon Jun 13, 2022 6:43 am

Hello everyone,
I got an orange screen during the boot on this PAL A1K
https://imgur.com/wse3FX2


Can not find anything about this screen color on boot
Any idea ?

Tanks a lot

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Zippy Zapp
CA, USA

Posted Mon Jun 13, 2022 10:11 am

JRZ wrote:
Mon Jun 13, 2022 6:43 am
Hello everyone,
I got an orange screen during the boot on this PAL A1K
https://imgur.com/wse3FX2


Can not find anything about this screen color on boot
Any idea ?
Check the Agnus chip and maybe re-seat it. I have seen in the past orange screens on A1000 relating to the Agnus. Just a guess really as I am sure it could be other things. But since it is a color screen some parts of the system are working so it should be fixable.

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randyrenfrow

Posted Tue Sep 13, 2022 3:20 am

The colors don't always mean the same things. Please check out that pdf from commodore and it has more specific trouble shooting for colors on the screen on bootup.

https://ia601207.us.archive.org/33/item ... hooter.pdf

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ddye

Posted Thu Oct 20, 2022 9:47 pm

My Amiga 1000 kept hanging on the light gray screen when trying to boot kickstart after being in storage for many years. I spent a bit of time with a logic analyzer and the online disassembled V1.2 kickstart and found that it was in an infinite interrupt loop (level 1). At first I thought it might be a problem with Paula setting one of the interrupt lines but that didn't seem to be the case. After some probing I discovered that one of the CPU socket pins wasn't making contact with the IPL0 signal of the CPU. I bent the IPL0 pin a little bit and was able to get the machine to boot up! The CPU socket was likely worn by my use of a Lucas accelerator board many years ago.

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sportingcp

Posted Fri Sep 29, 2023 2:13 pm

Wow, not bad. I had to search it myself a few times but now that everything is here it's much easier!





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