Amiga 1200 problem! please help me (noob)

[Anders1984]

Updated on page 4!

[utri007]

Most likey you mobo is 2b and it needs timing fixes. If you are cable do it yourself Ian Stedman web site is good source for information.

[Anders1984]

Originally Posted by utri007

Most likey you mobo is 2b and it needs timing fixes. If you are cable do it yourself Ian Stedman web site is good source for information.

Sure i can do it myself

do you have a link for this?

EDIT: is it this link?
http://www.ianstedman.co.uk/Amiga/am..._mobo_fix.html

Also found this. anyone tried this fix?
http://eab.abime.net/858901-post7.html

[demolition]

Have the accelerator been connected all the way? You shouldn't be able to see the expansion port pins when it is connected.

If it requires timing fixes, it usually just means that it will be unstable when running. I haven't heard about timing fixes would cause it to not boot at all, but I guess it might be possible.

[Anders1984]

Originally Posted by demolition

Have the accelerator been connected all the way? You shouldn't be able to see the expansion port pins when it is connected.

If it requires timing fixes, it usually just means that it will be unstable when running. I haven't heard about timing fixes would cause it to not boot at all, but I guess it might be possible.

yeah all the way. ive managed to get it to start when in wasnt connected all the way, so it seems someting else is wrong. maybe the connection is bad in someway.

[demolition]

Actually, I do remember someone who couldn't get it boot with the accelerator plugged all the way in. It had to be pulled out a mm or two and then it would work fine.

[Anders1984]

Originally Posted by demolition

Actually, I do remember someone who couldn't get it boot with the accelerator plugged all the way in. It had to be pulled out a mm or two and then it would work fine.

yeah thats what i did and it started. then after power off its the same yellow screen

[Retrofan]

It seems it's just the expansion slot pins. Perhaps alcohol isn't enough. I would use with care a sandpaper or a metallic brush on them till they are shiny. For what I know you will know if you need the timing fixes after running it, not booting.

[demolition]

Try to clean it on both sides with an eraser/rubber. It won't damage the pins.
It sounds like the problem is with the connector since you managed to get it to run once.

[Anders1984]

Ok thanks, ill do it tonight and post the results.

regards.

[john1979]

I have an A1200 with the exact same problem. Sometimes backing off the card helps, sometimes not. Cleaning with a rubber didn't help either.

http://eab.abime.net/support-hardwar...t-working.html

[fitzsteve]

It's most likely timing fixes. Your reseller of the ACA should be able to do these for you.

With regarding to timing issues any revision of Motherboard can suffer them with the ACA cards not just 2b.

Contact your reseller and ask about getting them done.

There is some info on the below link but according to FOL on these forums (Amigakit staff) he has mentioned some of the info is out of date now:

http://www.ianstedman.co.uk/Amiga/am..._mobo_fix.html

However, one more thing that might help, have you tried another PSU?

[demolition]

He wrote in the original post that he also tried using his A500 PSU with no change.

[Anders1984]

so heres the update:

cleaned the slot more, and tried with rubber.

It starts like every 7 or 9 time now, sometimes even twice.

but still the yellow screen. i managed to get a green screen too, and a software failiure screen some times too with different codes.

and i have the 1d4 rev...


im getting really confused now.. what to do?

[Anders1984]

i forgot, sometimes it starts and noting happends. just a black screen and the power light shining.

[fitzsteve]

Originally Posted by Anders1984

im getting really confused now.. what to do?

Contact your reseller about the timing fixes, they can also check your board for other faults.

Might even need the capacitors replaced.

[Anders1984]

capacitors?? but wouldnt i notice any problems without the accelerator?

i found a little little pin that was a little bit bent on the accelerator. tried to bend it back but putting the card in actually made it worse. so now i have to return it to the dealer, hopeing that this was the actual case.

its so bad i dont know anyone with an amiga here in stockholm, sweden.

ill get beck to you all when ive got the card replaced. meanwhile im waiting for the last workbench disk to be sent to me so i can install workbench 3.0

installing wb, magic wb and some games would be fine, right? when i get the card back ill just plug it in for some more memory, dont have to reinstall anyting?

[fitzsteve]

Unfortunately when you connect brand new hardware to a 20 years old Computer it can cause it to be unstable, I think your issues are due to A) Timing issues and probably B) failing Capacitors.

But this is only my opinion. I would contact your reseller and seek their advice, assuming you bought it brand new from a recognized reseller you're entitled to after sales support

[Anders1984]

Originally Posted by fitzsteve

Unfortunately when you connect brand new hardware to a 20 years old Computer it can cause it to be unstable, I think your issues are due to A) Timing issues and probably B) failing Capacitors.

But this is only my opinion. I would contact your reseller and seek their advice, assuming you bought it brand new from a recognized reseller you're entitled to after sales support

maybe youre right..

my reseller isnt that nice, telling me that my mb is dirty, which i dont think. overall the a1200 seems new! both on the outside and the inside...

we will se when i get the new card.

[Anders1984]

got my new card today with the same problem, but on a first test it seems all timing issues are gone when i manage to get the amiga to start.

so whats next? changing the capasitors?