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My towerised Amiga 1200 came out of storage recently and I've been messing around with it a bit. I decided to give it an OS upgrade so I purchased Kickstart 3.1 ROMs and Workbench 3.1 disks.

I swapped out the Kickstart ROMs (while using an anti-static wrist strap, of course) taking note of the correct orientation and which ROM part number goes in which socket. Then hit the power....and it doesn't work.

When powering on it's an immediate white screen - no black or dark grey for half a second, it's immediately white. However the power LED did light up dim for half a second then go to full brightness, as normally happens on an Amiga.

I swapped the original Kickstart ROMs back in and they too are giving the same problem. I've disconnected all the peripherals I can to rule them out. I've pushed the ROMs in as far as I can, and although they are not pushed in as far as they were at the start, I'm confident they are making good contact with the sockets.

Any idea what's happened? Have I toasted both ROMs, or the sockets, or something else in my Amiga? What do I try next? Is there any meaning to the white screen - I'd expect a color flash to indicate a fault.

Here's the way I have installed the ROMs:

^^^^^^^rear of Amiga^^^^^^

   U6B
.+------------------+
 |)   P/N 391774    |
.+------------------+
.+------------------+
 |)   P/N 391773    |
.+------------------+
    U6A

vvvvv front of Amiga vvvv
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6  
+1 for an Amiga question! –  Mehper C. Palavuzlar Jun 27 '10 at 19:47
    
Sounds like a classic example of toasting some component. I know you probably don't have access to a ton of amiga (or is it amigas) but if you could try your ROMs in another amiga you could tell whether it's the rom or something else. –  Daisetsu Dec 10 '10 at 23:57

1 Answer 1

up vote 0 down vote accepted

Here is what happens in the Amiga boot sequence. Since you're not getting to #3, "Clear the screen", I am guessing you broke a trace or a component on the motherboard somewhere in the process.

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Ouch. I had assumed that something like this had happened but hoped there was another (easier to deal with) answer. Thanks for confirming though :) At some stage I might buy another set of ROMs to try out in case it was just the ROMs I toasted, but I don't have a lot of hope... –  Richard Downer Dec 28 '10 at 12:25

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