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Author Topic: Amiga 4000 problem!!  (Read 5632 times)

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Offline CyberHanz

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Re: Amiga 4000 problem!!
« Reply #14 on: February 09, 2004, 04:31:04 PM »
Seems to me like a short-cut somewhere.
Last weekend I had a zorro card which shorted with the casing.
Resulted in the same symptons you mentioned,
gray screen, completely dead hd/floppy and exactly the same with the cdrom.
Try to remove the audiojack, and try again...
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Offline Madgun68

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Re: Amiga 4000 problem!!
« Reply #15 on: February 09, 2004, 06:36:29 PM »
Quote
I think there was a thread on here a while ago about audio capacitors on the 4000 mainboard blowing up. If these were on the brink, maybe plugging in the speakers while the system was on was too much for them? Try checking those.
I doubt it's the caps on the audio circuit. I had one go out, and the only thing that happened was that I lost one of the audio channels.
......
 

Offline Madgun68

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Re: Amiga 4000 problem!!
« Reply #16 on: February 09, 2004, 06:43:20 PM »
Hard one to diagnose. You know about the color sequence so I'd suggest sticking with that.

Somehow, it seems more like coincidence that the machine died when plugging in the speakers. (Although, it having one of those PC speaker connections, I'm not sure if an Amiga would have any issues with the speaker outs being shorted, which is a possibility with those plugs.) I'd make sure the connector hack is good. Then go for reseating stuff (including the cpu card.)
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Offline redrumloaTopic starter

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Re: Amiga 4000 problem!!
« Reply #17 on: February 09, 2004, 11:41:07 PM »
WHOA life!!!! I got home today and unplugged EVERYTHING including mouse and keyboard. Now I am able to get the 3.1 rom requestor!! Thank god for that!

Ok.. Now to try adding one thing at a time to see what was causing me grey hairs..... Stay tuned....
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Offline redrumloaTopic starter

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Re: Amiga 4000 problem!!
« Reply #18 on: February 10, 2004, 12:27:50 AM »
*Twilight Zone music plays*

Everything including sound is working. I suspect something overheated last night :-?  The only thing I am noticing right now is a little flakeyness of the CD-ROM on the internal IDE. But the internal IDE is known to be flakey right? I am suspecting the A3640 may be flakey :-?
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Offline Jeff

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Re: Amiga 4000 problem!!
« Reply #19 on: February 10, 2004, 03:10:36 AM »
I had an 4000D with this problem years ago (not audio related).  Turned out to be a flakey PAL at location U209 on the A3640 board.  A shot of freeze mist directly on that IC would cure it for a few minutes until it got hot again.  I seem to remember that PAL was hotter to the touch than it should have been.  I couldn't source a new one so I just replaced the board.  Might not be your issue but the symptoms were the same.

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Offline Acill

Re: Amiga 4000 problem!!
« Reply #20 on: February 10, 2004, 03:12:28 AM »
Hmmm, Is it just me or do th eA4000 series seem to be cheap? I've heard of so many having problems here in the last year. I've never had any problems with my A3000 and its up 24/7 all the time. I'm glad I never got an A4000.
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Offline Ilwrath

Re: Amiga 4000 problem!!
« Reply #21 on: February 10, 2004, 03:38:12 AM »
Quote
Hmmm, Is it just me or do th eA4000 series seem to be cheap? I've heard of so many having problems here in the last year. I've never had any problems with my A3000 and its up 24/7 all the time. I'm glad I never got an A4000.


Naw.... That's nuts.  If we just go by heresay, I currently have two perfect A4000s here, and one dead A3000 and one flakey A3000.  So therefore, the A3000 is obviously garbage, and the 4000 is great.  Of course, we both know this isn't true.  

I say the 4000 has no better or worse durability than any other Amiga.  Here's my theory on it....  

A4000s are typically found stuffed with all sorts of cards and add-ons.  Accelerator boards, SCSI cards, PCI risers, graphics, network, etc...  3000's certainly CAN be expanded out to this level, but aren't found that way as often.  Of course, the more that is added into a computer, the more likely the power supply will blow.... Or some shoddy card will short out the system...  Or who knows what else....  And, of course, anything that damages a CIA in the 4000 is a major problem, because they're surface mounted.  (An A3000 with blown CIA is hardly worth posting about.... It's a 10 minute fix.)  The surface-mounted chips make the 4000 a real pain to service, hence more people ask questions before trying to swap out components, etc...  Thus, it looks like there are more problems with them, because more problems get posted.
 

Offline Acill

Re: Amiga 4000 problem!!
« Reply #22 on: February 10, 2004, 04:10:21 AM »
Sound fair to me. i am still glad I have a A3000 though! :)
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Offline redrumloaTopic starter

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Re: Amiga 4000 problem!!
« Reply #23 on: February 10, 2004, 12:49:19 PM »
Ok it's definately an overheating problem of some sort. I am suspecting the 3640 is the culprit. I hope that is the case because the A3640 is only in there temporarily, I will be putting in the CSPPC tonight:-)
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Offline restore2003

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Re: Amiga 4000 problem!!
« Reply #24 on: February 10, 2004, 01:14:56 PM »
But still, its amazing how much beating the amiga hardware can handle compared to pc hardware, i had an a2000 for 7 years without problems, and a a500 from 1987 to 1994, and it has been dropped on the floor atleast 2 times, spilt cola over the keyboard and lots of other things.

but when i started using pc`s 3 years ago, i have had nothing but trouble, 3 pc`s die, and those were taken good care of  :-x

And those saying amiga hardware is expensive, think about having to replace pc`hardware 3 times as frequent, and it adds up....
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Offline amigamad

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Re: Amiga 4000 problem!!
« Reply #25 on: February 10, 2004, 03:15:25 PM »
Quote
Hmmm, Is it just me or do th eA4000 series seem to be cheap? I've heard of so many having problems here in the last year. I've never had any problems with my A3000 and its up 24/7 all the time. I'm glad I never got an A4000.


I think the a4000 suffers because of the poor quality case that does not have much room for airflow.I am thinking of putting some coolermaster ram heatsinks on some of the chips in my a4000 and modding the psu for better airflow.


Quote
but when i started using pc`s 3 years ago, i have had nothing but trouble, 3 pc`s die, and those were taken good care of  


none of my pc.s  ive built have had any problems including the first amd 450 k6.stick to good motherboards like asus my jetway was good as well but my msi was crap.
I once had an amigaone xe but sold it .

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Offline Cyberus

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Re: Amiga 4000 problem!!
« Reply #26 on: February 18, 2004, 12:17:02 PM »
Quote

restore2003 wrote:
But still, its amazing how much beating the amiga hardware can handle compared to pc hardware, i had an a2000 for 7 years without problems, and a a500 from 1987 to 1994, and it has been dropped on the floor atleast 2 times, spilt cola over the keyboard and lots of other things.

but when i started using pc`s 3 years ago, i have had nothing but trouble, 3 pc`s die, and those were taken good care of  :-x

And those saying amiga hardware is expensive, think about having to replace pc`hardware 3 times as frequent, and it adds up....


I can't say I have an awful lot of experience with PC hardware, having only owned this laptop. But it amazes my friends when we are playing a game on the CD32 and I tell them that it is over ten years old [both the quality of the games and the fact that its still going]

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Offline AmiDelf

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Re: Amiga 4000 problem!!
« Reply #27 on: February 18, 2004, 01:39:14 PM »
@Acill

My dear friend. My A4000 works without problems :)
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Offline spavatch

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Re: Amiga 4000 problem!!
« Reply #28 on: February 18, 2004, 06:01:11 PM »
@AmiDelf

So does mine :-D.

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Offline gwalp

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Re: Amiga 4000 problem!!
« Reply #29 from previous page: February 18, 2004, 06:14:59 PM »
Check your voltages from your ps. Check the wiring on the spliced in speaker wiring.  It's better to use the original connectors for the sound and use a Y cable to hook up pc speakers.

My dear old friend, my A4K works fine. It has a couple of broken clips on the motherboard ram slots and I had to remove the battery. Other than that it runs fine.  I've taken it apart down to pieces on the table and put it all back together and then did it again. It's now in a Power Tower case with a Phase5 060 board with 72meg of ram so I don't worry to much about the broken ram clips on the motherboard. Considering I've had it since new in summer of 1993 when I upgraded from my A500 I bought in 1988 in think it was one of the best purchases as for as computers or concerned.

In 2000 a got my first pc and I've had to upgrade systems three times. It's just about time to upgade system or at least cpu again just to stay close to current.

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