Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Nefiemus on February 18, 2008, 07:43:54 PM

Title: Amiga 2000HD - White Screen
Post by: Nefiemus on February 18, 2008, 07:43:54 PM

Hi there,

I've been looking online for this one, and as far as I know, white screens on boot means that the hardware is not properly initialized.

I've got that Amiga in this summer, it didn't had any power supply. So I took an ATX power supply and wired it on the Amiga. The only problem, is that the power supply doesn't have any -5V output (kinda weird, but it's a Dell, pretty normal).

So right now, the Amiga does boot, but with a white screen. Is the -5V output the cause of the problem? Is it necessary? And if so, is there any easy way to obtain a -5V :P

I use the RCA video connector if that helps,

Thanks,
Jason

Title: Re: Amiga 2000HD - White Screen
Post by: gdanko on February 18, 2008, 07:57:11 PM

Red - Bad ROM
Yellow - CPU Exception Before Bootstrap Code is Loaded
Green - Bad Chip RAM or Agnus (check seating of Agnus)
Black - No CPU
White - Expansion passed
Grey - CPU Passed

Constant white is failure of CPU.

Title: Re: Amiga 2000HD - White Screen
Post by: Nefiemus on February 18, 2008, 08:02:17 PM

Umm, well it's white, and after around 8 seconds, the screen blink and it gets white again, so... it means my CPU's dead?

EDIT: Also, the battery leaked a good lot in there, maybe just by deep cleaning the region? The socket pins are green-ish, how can I clean that?

Title: Re: Amiga 2000HD - White Screen
Post by: rkauer on February 18, 2008, 09:12:36 PM

 Carefully remove the CPU, clean it with a soft sand paper (don't EVER use iron wool!), check the motherboard CPU traces and remake those who failures.

Title: Re: Amiga 2000HD - White Screen
Post by: Nefiemus on February 18, 2008, 09:49:11 PM

I'll try that, if it doesn't work, I'll just ask my uncle if he wants to give me an Amiga eheh