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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: orange on July 01, 2008, 12:28:04 PM

Title: broken A1200 :/
Post by: orange on July 01, 2008, 12:28:04 PM

I got a dead A1200 motherboard, here is what shows up on screen after turning on:

(http://www.fileden.com/files/2007/6/28/1218776/Amiga/MVI_1348%5B13-03-29%5D.JPG)


and here's video (http://www.fileden.com/files/2007/6/28/1218776/Amiga/MVI_1348.AVI) (31Mb)

it seems that blue screen flashes for a moment, and a green one on power-off.
is there any chance of fixing it?

Title: Re: broken A1200 :/
Post by: darksun9210 on July 01, 2008, 05:18:39 PM

just a bare A1200? no expansions? no hard disks?

Title: Re: broken A1200 :/
Post by: Bazzaq on July 01, 2008, 05:33:09 PM

Is that through the monitor connector? have you tried the modulator/composite out?

Title: Re: broken A1200 :/
Post by: orange on July 02, 2008, 07:26:07 AM

It's just a bare motherboard, connected with good RGB cable. I removed the RF modulator because it looked broken.
One of previous owners tried 'keyboard hack'; he tried soldering wires to keyboard controller but it was a messy job and probably something was shorted. Also the ROM chips were blown (literally!) but I've replaced them.

Since blue and green screen flash occasionally, custom chips or Chip RAM are suspects?

Title: Re: broken A1200 :/
Post by: Ideal on July 07, 2008, 01:46:29 PM

Probably the chip ram is dead.

Title: Re: broken A1200 :/
Post by: countzero on July 07, 2008, 03:15:22 PM

blue screen means pretty much anything could be dead. I'ld suggest not wasting your time on this board.

Title: Re: broken A1200 :/
Post by: tokyoracer on July 07, 2008, 05:56:09 PM

@ countzero. Just like another sort of computer I know of. :lol:  :lol: