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Old 25 October 2009, 17:18   #1
8bitbubsy
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Weird A500 boot-up behavior

Whenever I turn on my Amiga 500 (cold or hot boot - doesn't matter), I get one random color (filled screen) before the actual cycling-through-gray palette. It disappears after around 500ms to 1 second... No signs of error after boot!
It's usually pink or white/dark gray, but sometimes cyan (!)... Seems to me like error codes, right?

Checklist:
PSU OK? Check
No caps leaks? Check
Kickstart OK? Tried another one? Check, and Check
Reseated all chips? Check
Tried to boot the A500 without NO expansions? Check
Inspected the mobo good? Check


What IS this?! It's not like it's a big deal, but I'd like to know what can cause it.. Maybe it's actually making conflicts.
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Old 25 October 2009, 17:54   #2
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http://www.amigahistory.co.uk/selftest.html Look here may help
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Old 25 October 2009, 19:21   #3
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unless its any of these
* Red: An error was found in the ROM.
* Green: An error was found in Chip ram.
* Blue: An error was found in the custom chips.
* Yellow: The CPU has found an error before the error trapping software (Guru) has been activated.

I would`t worry to much, I`m no expert but its probably random junk in display ram or similar, a few more weeks using it will show if its serious or not

now get back to enjoying you retro demos
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Old 25 October 2009, 19:31   #4
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... It hadn't been in use for like 4 weeks. *Every* time I boot it, I get those colors. Cold boot or hot boot...
Also, I don't see anything about "cyan" nor "pink" in there.
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Old 25 October 2009, 19:44   #5
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That's because those colours you are describing are not errors (or at least known errors). I must admit, it does seem a little strange.

Has there been any additions/replacements to the mobo at all?
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Old 25 October 2009, 20:41   #6
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Hmm no, the mobo is all fine and "unmodded".
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Old 25 October 2009, 20:58   #7
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Quote:
Originally Posted by DemonHellraiser View Post
I'm sure I have seen a more comprehensive online description of the SelfTest Output referred to in these forums, but I can't find it now.

Does anybody else remember seeing it? It would be really useful for this thread.
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Old 25 October 2009, 21:02   #8
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perhaps this one but it just the same info
http://eab.abime.net/showthread.php?t=20302
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Old 25 October 2009, 21:10   #9
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It might have been that one, but I don't think so. I thought I had saved a copy of the one I am talking about, but I can't find that either!

If I'd had any of those bootup problems myself, then I would not have forgotten it!

However, the good news is that, like you, I don't think 8bitbusby has got anything to worry about.
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