Weird Amiga problem - Auto-firing

27 September 2015, 18:11

Hey guys, here's a strange problem, hope someone can help.

I've had and loved my Amiga 600 for very long time.

Over the years I have added:-

1 meg upgrade
An accelerator card
An IDE CF Card with WHDload

I have my Amiga pride of place next to my PC so I can always use it whenever the need grabs me, which is pretty often.

A few days ago, I switched it on as usual to play some games and suddenly out of the blue, its started acting very strange - The joystick seems to be firing by itself as if the button is being pressed.

For example: When I load a game such as Fire & Ice or Bubba 'n' Stix, the games immediately go straight past the title screen and into the game as if I had pressed the fire button, and when the game starts, the main characters are firing their main weapon by themselves.

Things I have tried to remedy the situation:-

Removing the memory upgrade.
Removing the accelerator card.
Removing the hard drive and trying the game on floppies.
I have even removed the joystick it still does it.

I have now stripped the Amiga down to its bare essentials and it still happens.

I have had my Amiga for years and I would say I know a fair bit about them, but this has me completely confused.

Any advice would be greatly appreciated - I am at your mercy

-Steve

Lord Aga · 27 September 2015, 20:24

Is it Rev 2D by any chance ?

27 September 2015, 20:43

No, it's Rev 1.3

supaduper · 27 September 2015, 21:10

There is probably a break in one of the connections from the port to the motherboard as a guess, you will need to get the multimeter out and check continuity on the traces from the port pins,this does happen on our amigas, just hope its not a chip problem.
Also as I have stated many times before do not plug in mice or joysticks while the Amiga is on because you have a good chance of blowing chips

27 September 2015, 21:18

Ok, I will check the continuity later, could this still be the case though if it still happens with no joystick plugged in?

Thanks for your help

supaduper · 27 September 2015, 22:20

yes I have come across this problem before ,basically the signal is stuck on

28 September 2015, 09:27

Well, after taking the motherboard out and inspecting, it seems I do not possess the necessary skills to complete the job. The best I could do was to check the continuity to the nearest component.

I guess I'm off to ebay now, sad times, I've had that 600 for many years.

Cheers for the help.

-Steve

27 September 2015, 18:11	#1
SteveSJB Posts: n/a	Weird Amiga problem - Auto-firing Hey guys, here's a strange problem, hope someone can help. I've had and loved my Amiga 600 for very long time. Over the years I have added:- 1 meg upgrade An accelerator card An IDE CF Card with WHDload I have my Amiga pride of place next to my PC so I can always use it whenever the need grabs me, which is pretty often. A few days ago, I switched it on as usual to play some games and suddenly out of the blue, its started acting very strange - The joystick seems to be firing by itself as if the button is being pressed. For example: When I load a game such as Fire & Ice or Bubba 'n' Stix, the games immediately go straight past the title screen and into the game as if I had pressed the fire button, and when the game starts, the main characters are firing their main weapon by themselves. Things I have tried to remedy the situation:- Removing the memory upgrade. Removing the accelerator card. Removing the hard drive and trying the game on floppies. I have even removed the joystick it still does it. I have now stripped the Amiga down to its bare essentials and it still happens. I have had my Amiga for years and I would say I know a fair bit about them, but this has me completely confused. Any advice would be greatly appreciated - I am at your mercy -Steve

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27 September 2015, 20:24	#2
Lord Aga MI clan prevails Join Date: Jul 2010 Location: Belgrade, Serbia Posts: 1,443	Is it Rev 2D by any chance ?

27 September 2015, 20:43	#3
SteveSJB Posts: n/a	No, it's Rev 1.3

27 September 2015, 21:10	#4
supaduper Registered User Join Date: Oct 2012 Location: Krypton Posts: 1,210	There is probably a break in one of the connections from the port to the motherboard as a guess, you will need to get the multimeter out and check continuity on the traces from the port pins,this does happen on our amigas, just hope its not a chip problem. Also as I have stated many times before do not plug in mice or joysticks while the Amiga is on because you have a good chance of blowing chips

27 September 2015, 21:18	#5
SteveSJB Posts: n/a	Ok, I will check the continuity later, could this still be the case though if it still happens with no joystick plugged in? Thanks for your help

27 September 2015, 22:20	#6
supaduper Registered User Join Date: Oct 2012 Location: Krypton Posts: 1,210	yes I have come across this problem before ,basically the signal is stuck on

28 September 2015, 09:27	#7
SteveSJB Posts: n/a	Well, after taking the motherboard out and inspecting, it seems I do not possess the necessary skills to complete the job. The best I could do was to check the continuity to the nearest component. I guess I'm off to ebay now, sad times, I've had that 600 for many years. Cheers for the help. -Steve

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