Amiga 3000T won't boot

[orange]

well, I think the problem is with disconnected  scsi cable.
I never owned A3000T, but (IIRC) in all other scsi Amigas, if I disconnect  everything from scsi controller, it wont boot because its not terminated. try once more with HDD (jumpered with term on) connected to that scsi.

also, when powering up, does power LED change brightness?

[scuzzb494]

Contact Anthony Hoffman.. I have his email address. Just post me private.

He is the guy I will be sending my boards to. I'm sure he won`t mind me giving out his mail address

PS Do not try to remove the battery. There is a railway station full of tracks below this baby and seriously you could destroy the motherboard.

http://www.commodore-amiga-retro.com/amiga/amiga_scuzz69.htm

PPS I have moved on long journeys an A4000T and A3000T and surprise surprise neither worked when I hooked them back up. Quite a common problem. I wouldn`t mess too much cus it really will be just a loose board or connection. Your best bet is to preserve the computer first and get someone skilled to remove the battery. They can check for electrical continuity. It will NOT be anything serious. What is serious is the preserving of this machine. Its at times like these you can do real damage. Slow down, pause, don`t panic and take things one step at a time. The battery must be desoldered by someone who knows what he is doing. After that its just maintenance.

[tlgrooms]

Hooked up scsi drive terminated to internal scsi connection and still nothing.  Power LED never changes brightness once it comes on.

Scuzzb494, removed battery 10 years ago.  Never replaced it and never had a problem after removing it until now so I don't believe that has anything to do with it.

[orange]

um, did you check that keylock thing mentioned here?
otherwise, you should try the 'usual procedure'- press on every socketed chip, check PSU contacts, RAM modules.. if possible see which chips get (too) warm.

[slayer]

Contact Anthony Hoffman..

I've been speaking with Anthony over the last few days, it looks like he's only got a week or two left before he heads out to the bottom of the world and he won't be back till November 2011.

So I think your A3000T MB might have to wait a bit... I'm going to check my A3000T tonight after all this discussion...

It's been sitting behind me in the cpu room for about 2 years since I got it up and running (brought it dead) and I don't think I removed its battery...

[scuzzb494]

Hooked up scsi drive terminated to internal scsi connection and still nothing.  Power LED never changes brightness once it comes on.

Scuzzb494, removed battery 10 years ago.  Never replaced it and never had a problem after removing it until now so I don't believe that has anything to do with it.

I thought this was a thread by a guy called mvansickle who said he had a leaky battery. have we flipped into different threads here...

He said....

Sadly, I seem to be a victim of the leaking battery. I can see where a drop of acid has fallen from the battery on to the motherboard and disintegrated 2 or 3 traces. Argh!!! I wish I had known about the battery problem sooner.

I don't suppose there is any way to repair this?

I was replying to him. I have no idea what your problem is. Confused.

[Pentad]

I thought this was a thread by a guy called mvansickle...I have no idea what your problem is. Confused.

You stepped into a Soap Opera of sorts that revolve around Amiga Hardware namely the Amiga 3000T.  You see one Amiga 3000T appears to be dead but its twin brother showed up claiming its the father of an Amiga 4000 that the original one had with a v-e-r-y loose Amiga 1000.

Now, one Amiga 3000T is naked and is about to come out of the closet to see if its 'battery' is damaged.  Also, I believe some Amiga Doctor is going 'south' until 2011.

I'm really quite hooked because I've been following this for over 25 years so I want to see how it comes out...

To bring you up to speed:

1 dead or dying Amiga 3000T that was fine until it moved to a new 'town'.  Its brother (an Amiga 2000) was able to rummage through its stuff and boot.  Could the Amiga 2000 have had something to do with the 3000T's sudden coma?

Another Amiga 3000T has also suddenly become ill as well.  Nobody is a suspect right now...though a battery was accused but found to be gone.

However, one battery has been identified in I believe the first one Amiga's illness.  The battery has been 'taken care of' but many traces were lost in the ordeal...

So what is causing one of the Amiga 3000T's not to boot?  So many guesses: bad keylock, the usual suspects (Gary, Buster, Amber, Paula, Denise, the CIA,  Agnus, etc..), a curse of some sort??    

Will all the Amiga's make it?   Who will bring them back from the brink?  Where is the Amiga Doctor going?  Is the closeted Amiga still ok?  

You see, its much more than a thread....

Cheers!

[tlgrooms]

Going to try pulling and reseating the chips.  I have a working 3000 desktop also I can swap some chips with.  Can anyone point me in the direction of a good tool to pull the square chips with?

The guy who started this thread hasn't posted here in 3 years.  I originally asked if he got his machine working because mine was showing the exact same signs as his with the video signal but blank black screen and power led never doing anything but coming on and staying solid.

[T3000]

heh Pentad, too funny.

tlgrooms ~ get a PLCC extractor for the deep socketed chips or else risk damage to sockets if attempting to remove with a screwdriver. Same with the DIP chips, use a DIP extractor.

My A3000T has similar issues. Although it's been a while since I've attempted to resurrect the unit. Missplaced the notes I've made of it's startup symptoms. I keep forgetting about the lock key hotwiring...  Now I want to skip work and tinker with the beast.

If I also recall, Anthony Hoffman did some work on an A4000D for me several years ago. Exellent resource.

We should get a count of how many nonworking A3000Towers are out there...

[tlgrooms]

Swapped all the socketed chips in my 3000T with the ones in my 3000 desktop (known working) except for the memory chips without any change. sigh....

[mousehouse]

Swapped all the socketed chips in my 3000T with the ones in my 3000 desktop (known working) except for the memory chips without any change. sigh....

Just curious and admiring your efforts to get the machine going...

Isn't it a real possibility that your power supply has failed? If it is not able to provide enough 'juice' anymore due to age you will have some weird effects. As LED's and things will probably only draw a little current on 5V they might still work.

Jus a guess, maybe you can get a cheap ATX to Amiga PSU adapter cable somewhere to test this...

[dougal]

@tlgrooms

well have you checked the battery?
fixing the corroded traces is easy, the problem is finding them.
cheapest but ugliest solution is to just soldier wires. or use liquid silver and such.

That works... I had fixed a 500Plus which had a damaged trace (due to leaky battery) and soldering a wire to act as a bridge worked perfectly.

[narcea]

Way back my A3000 died in a very simular way. I spent like $300 (ripped off) to have it repaird and it died again a month later. I left it for dead. Five years later I revisited it only to find the problem to be the daughter card wasn't seated perfectly.
If it's not seated perfectly or the connetions are a little dirty then it won't boot.

I'm not sure if the A3000T has this problem or not though...

[T3000]

the problem to be the daughter card wasn't seated perfectly.

I'm not sure if the A3000T has this problem or not though...

The A3000 Tower does not have a daughter card.

[tlgrooms]

More bad news, just checked my power supply and it appears to be working fine.  Keylock appears to be fine as well.

[don27dog]

Remove the Cyberstorm. Change the jumpers on the MB and see what happens.

Jumper setting

060
100 3-4
102 1-2
104 1-2
103 2-3

040
100 3-4
102 2-3
104 2-3
103 1-2

030
100 1-2
102 2-3
104 1-2
103 2-3