A4000 won't boot

BinoX · 18 October 2005, 19:00

Here's a strange problem...

Recently my Amiga 4000 stopped working, so I went through all the stages of working out what was wrong.

I've changed the processor card, changed the RAM, removed all the zorro cards, removed EVERYTHING except the motherboard and left it for hours to see if it would get anywhere... but no luck... all I get it the A4000 sitting on the grey screen..

If I plug the keyboard into it I can activeate and de-activate caps lock and if a hard drive is in there it spins up and the hdd access light comes on...

So I went to the trouble of buying a new A4000 motherboard... (THE EXPENSE >_<) And I plugged it in, all optimistic.. and... SAME PROBLEM..

I'm running out of ideas... The only thing I haven't changed is the power supply... and I can't find one to change it with..

Anyone got any suggestions on hat I should check next on the Amiga?

And does anyone have a pinout of the power connector on the A4000 so I can mod an AT power suply to check it?

THX1138 · 18 October 2005, 19:15

Make sure that the kick rom chips are seated down properly,just give them a firm push !

Bamiga2002 · 18 October 2005, 19:28

Quote:

Originally Posted by BinoX

I'm running out of ideas... The only thing I haven't changed is the power supply... and I can't find one to change it with..

That could be the problem, try to find a replacement if nothing else works.

FromWithin · 18 October 2005, 20:00

If I remember rightly, the Amiga spits out debug info from the serial port at 9600 baud. Can anyone confirm this? You could connect a PC via null modem and see what's happening.

Jope · 18 October 2005, 20:04

Quote:

Originally Posted by FromWithin

If I remember rightly, the Amiga spits out debug info from the serial port at 9600 baud. Can anyone confirm this? You could connect a PC via null modem and see what's happening.

Only if you have rom wack enabled from the workbench.

BinoX · 18 October 2005, 20:21

Thanks all, I took out, cleaned off and reseated the roms... Didn't work at first but then I put all my weight down onto the roms and now it's working like it used to again

I wonder if that's the problem with my old board too.. if it is I'm gunna have 2 A4000s ^_^

Thanks again.

wizard66 · 18 October 2005, 20:23

PSU On Ebay from 1 EURO

http://cgi.ebay.nl/Amiga-4000-PSU_W0...QQcmdZViewItem

lopos2000 · 18 October 2005, 20:40

Why no paypal?

alexh · 19 October 2005, 13:18

Binox: If you ever need any spare parts et al, I am just over the bridge in Plymouth, I could have lent you a spare PSU (had that been the real problem).

THX1138 · 20 October 2005, 20:22

Quote:

Originally Posted by BinoX

I wonder if that's the problem with my old board too.. if it is I'm gunna have 2 A4000s ^_^

You can send me the spare one if you like as a form of payment for solving your dilema

Seblington · 21 October 2005, 07:03

Always check the CMOS batt which damages the board, is the fan on the PSU spinning? If so its unusual that it would be faulty

Dr. Dude · 23 October 2005, 12:58

to prevent things like not good fitted chips
- buy some glases as you sure need if you don't see it

- Keep all and evrything clean < If there is durt in the socet yeah duh no wonder you get probs

But i still wander why it suden stoped working

source · 25 October 2005, 05:26

try looking at elbox.com. they have PSU addaptors for converting modern ATX PSUs to the older connections for the 4000D and 4000T

18 October 2005, 19:00	#1
BinoX Miggy Man Join Date: Nov 2004 Location: Cornwall, United Kingdom Age: 40 Posts: 831	A4000 won't boot Here's a strange problem... Recently my Amiga 4000 stopped working, so I went through all the stages of working out what was wrong. I've changed the processor card, changed the RAM, removed all the zorro cards, removed EVERYTHING except the motherboard and left it for hours to see if it would get anywhere... but no luck... all I get it the A4000 sitting on the grey screen.. If I plug the keyboard into it I can activeate and de-activate caps lock and if a hard drive is in there it spins up and the hdd access light comes on... So I went to the trouble of buying a new A4000 motherboard... (THE EXPENSE >_<) And I plugged it in, all optimistic.. and... SAME PROBLEM.. I'm running out of ideas... The only thing I haven't changed is the power supply... and I can't find one to change it with.. Anyone got any suggestions on hat I should check next on the Amiga? And does anyone have a pinout of the power connector on the A4000 so I can mod an AT power suply to check it?

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18 October 2005, 19:15	#2
THX1138 Amiga Centurai Join Date: Nov 2002 Location: UK Posts: 526	Make sure that the kick rom chips are seated down properly,just give them a firm push !

18 October 2005, 20:00	#4
FromWithin Music lord Join Date: Jun 2003 Location: Liverpool, UK Age: 50 Posts: 630	If I remember rightly, the Amiga spits out debug info from the serial port at 9600 baud. Can anyone confirm this? You could connect a PC via null modem and see what's happening.

18 October 2005, 20:21	#6
BinoX Miggy Man Join Date: Nov 2004 Location: Cornwall, United Kingdom Age: 40 Posts: 831	Thanks all, I took out, cleaned off and reseated the roms... Didn't work at first but then I put all my weight down onto the roms and now it's working like it used to again I wonder if that's the problem with my old board too.. if it is I'm gunna have 2 A4000s ^_^ Thanks again.

18 October 2005, 20:23	#7
wizard66 FPGA Replay inside A590 Join Date: Sep 2004 Location: Rotterdam/Netherlands Age: 57 Posts: 294	PSU On Ebay from 1 EURO http://cgi.ebay.nl/Amiga-4000-PSU_W0...QQcmdZViewItem

18 October 2005, 20:40	#8
lopos2000 Zone Friend Join Date: Apr 2005 Location: Cider is best In The West Posts: 1,238	Why no paypal?

19 October 2005, 13:18	#9
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,354	Binox: If you ever need any spare parts et al, I am just over the bridge in Plymouth, I could have lent you a spare PSU (had that been the real problem).

21 October 2005, 07:03	#11
Seblington Amiga Nutter Join Date: Sep 2005 Location: Paignton, Devon. Age: 43 Posts: 220	Always check the CMOS batt which damages the board, is the fan on the PSU spinning? If so its unusual that it would be faulty

23 October 2005, 12:58	#12
Dr. Dude Senior Member Join Date: Jan 2004 Location: On Ami World Posts: 500	to prevent things like not good fitted chips - buy some glases as you sure need if you don't see it - Keep all and evrything clean < If there is durt in the socet yeah duh no wonder you get probs But i still wander why it suden stoped working

25 October 2005, 05:26	#13
source Zone Friend Join Date: Jul 2005 Location: Toronto, Canada Posts: 734	try looking at elbox.com. they have PSU addaptors for converting modern ATX PSUs to the older connections for the 4000D and 4000T

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