Amiga.org
Amiga computer related discussion => General chat about Amiga topics => Topic started by: Vlabguy1 on February 18, 2007, 02:32:26 AM
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I just posted two pictures of my A4000T ..that needs a bit of help.
Im the orig. owner of everything in the picture..but here is the problem..
Does not display image through my CV64 card..I did some tests and
found I was missing 12v from the serial port...mmmm...Could I be
missing this 12v from the Zorro Bus as well?? I know the CV64 works,
I installed the drivers correctly..so its not a software issue..
She does work in straight NTSC mode..
Any ideas??
Thanks
Rich
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Please, explain a bit better: you have image from composite/RGB port (silly question on an A4000)?
Do you measure the PSU voltages? With a multimeter, of course.... :-P
Not joking: Do you have image only if you set the mode to NTSC and no other modes runs? Reinstall (Windows way of correcting bugs) all the Worbench and the drivers thereafter....:-(
Sounds much for nothing? Then give your Amiga to me. I'll much happy in fix those issues myself... :-D
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Well..I did measure the PS..that is ok..I did reinstall all software..that is OK..
I get no output from Graphics card..I know that work as I tested in another
machine.
It seems I am missing 12v at the Serial connector..which..Im sure that 12v
goes other places as well..like the Zorro bus??
Yes I only get NTSC mode from the 4000T video module..not from the CV64
I know this is NOT a Workbench/CV64/ or a cybergraphics problem..
Perhaps I have some leaky or blown caps somewhere on the mother board?
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Has the Cybervision ever worked in that setup? What I mean is, are these new problems?
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Does this happen with both your A4000Ts? Did you try the stuff from this thread (http://www.amiga.org/forums/showthread.php?t=24090)?
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Yes these are new problems...I have had this card in this computer only..for a very long time ..ie..when the CV64 first came out ..thats when I bought it and
installed it..
All was fine then one day..I started to have this problem..
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the problem does not occur in my other 4000T or my 4000D..
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time to reseat/clean contacts/socket!
and check the presence of the 12V on the Zorro slots (look at the A4000 User Giude)
+12v = pin 10
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Framiga wrote:
time to reseat/clean contacts/socket!
and check the presence of the 12V on the Zorro slots (look at the A4000 User Giude)
+12v = pin 10
Not sure which contacts / sockets you mean..I have pulled the VC64 card out and tried in all the zorro slots.and I did check the contacts..they are clean
as new..
However I will check the +12 on pin 10 for sure. ..so..if for some reason..I dont have the +12v..then what..??
do I have a blown or leaking cap??
I know the PS is good..I tested it and I also just to double check used a new PS and still the same result..
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So..
1) CV64 works with your other Amigas
2) PSU is working fine in both 4000Ts (PSU checked & switching them with other A4kT doesn't help)
3) Software installation is not the problem (clean install tried, switching working environments between A4kTs (and with modifications instructed in that other thread with A4kD) doesn't help)
4) 12V line is missing in the suspicious A4kT mb (can be found in other one and in A4kD)
If you've tried it all, maybe it is then "simply" hw-problem with the motherboard (with 12V-line or other), somewhere between PSU-connector and zorro/serial.
Hopefully Amiga Repair France or amiga.serveftp.net can help - maybe you could email them about the symptoms&findings thus far and the possibility of fixing?
EDIT: you should try cleaning and re-seating everything on the mb as framiga suggested - this has helped me numerous times.
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i meant to say everything with a connector or a socket on the mobo.
SuperBuster, kickstart, quartz Zorro daughter board everything.
Obviously if you don't have the 12v on the Zorro bus, the fault is more difficult to catch. (sorry but i don't know your skills about electronic repairs/restoring)
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I may have to do that..as it really is a HW issue vs a SW one...I for a fact Im missing +12v on the ext. serial connector..
Funny how it would go like that one day..it all works then nothing..
The Amiga Repair Center is a good place?? I mean I dont want to send my
MB..then not get it back..if you know what I mean..
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the best and reliable you can find around! :-)
Edit- take a look even at the 6 pins "Molex" power connector on the mobo (or better on the mobo close the connector to be 100% sure that the 12v is present)
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Definitely. I trusted them enough to send my mobo there, so don't worry about how they will treat your mobo. Just make sure you use a reliable postal method.
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I
Framiga wrote:
Obviously if you don't have the 12v on the Zorro bus, the fault is more difficult to catch. (sorry but i don't know your skills about electronic repairs/restoring)
No worries..I got the skills..Im very comfortable working with circuit boards, soldering etc. and pretty handy with a multimeter..
I take it ..in chatting with everyone here..that this problem has not been seen or encountered before..or atleast by one who has read this post and the one I posted a while ago regarding this same problem.
I think I will see whats up with the 12V. on the Zorro bus..then next I will check the A/V module card , and I/O module card..for anything obvious..then will probably pop out the Mother Board..to do a close inspection of all chip and components..
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I will def. check the MoBo...power connector..
Thanks..
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X-ray wrote:
Definitely. I trusted them enough to send my mobo there, so don't worry about how they will treat your mobo. Just make sure you use a reliable postal method.
thanks for the info.. I hope I dont have to go that far..but I will if needed.
Oh..what kinda turn-around ..weeks, months..etc..
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OT
just noticed your Idek monitor! i have used one of the same series for years; a MF5121 (now dead.. fixed for 10 times at least)
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I use the Idek for toaster/NTSC..stuff..but my main monitor ..ie for the CV64..is a big 21" Sony CRT..that sucka is heavy and huge!! looking to get a flat panel..if I get the machine running on the VC64 card again..Well Im not sure the CV64 can handle a flat panel..??
just noticed..my toaster/flyer system..is the random photo..lol hehe
I love that
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i'm on a Dell 17" TFT currently without any problems (CVPPC and CV64 installed on both AmigaOS3.9 and MOS for PowerUP)
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Try the psu in your other box? Might be worth a shot even if multimeter tells you it outputs the proper voltages.
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Framiga wrote:
i'm on a Dell 17" TFT currently without any problems (CVPPC and CV64 installed on both AmigaOS3.9 and MOS for PowerUP)
Very nice..ty..Would a Dell 19" work as well..I can prob borrow one from work just to test it out..see if I like ..
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Tomas wrote:
Try the psu in your other box? Might be worth a shot even if multimeter tells you it outputs the proper voltages.
I might try that..however I did try a brand new PS..with the same results..
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17" and 19" (unfortunately) uses the same resolution (1280x1024)
You have to chose a 16 bit mode (due the 4MB only VideoRam of the CV64)
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thanks..lets hope I get that far..with this A4000T..
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Hi,
Keep your CRT, you'll be desapointed with LCD screen, which are only correct are their top resolutions...
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Forgive me for stating the obvious... But in reading through this thread its not clear whether you tried using a different monitor on the 'faulty' machine? I'm sure you did, but figure it worth mentioning. Just a tunnel-vision check. :lol:
I know I'm guilty of it on occasion; focusing in on technical minutia, possibly overlooking something really simnple? Like - "It won't work in 'O-F-F' mode" (military joke..).
One of my co-workers who is extremely smart gets caught in that trap all the time. If you ask him what time it is, he'll tell you how to build a watch. :lol:
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Yes I tried the monitor with other systems..and it works..
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quenthal wrote:
Does this happen with both your A4000Ts? Did you try the stuff from this thread (http://www.amiga.org/forums/showthread.php?t=24090)?
That thead and this one pertain to the same 4000T..Im just now getting round to really get this thing fixed..Well upon taking it apart..I found a few interesting things ..with several items..First the
Ports Module seems to have a few issues..witht the Caps..green fuzz around the solder pad..to me does not seem normal..I will post pics..That makes sense as I had a 12V loss at the serial port. MMMM..where can I get one of those..
Second the A/V module..same thing with some of the caps..which..I believe to
be related to the sound part of that board as I was able to use my Idek...Need to get one of those as well..
Third, and this is without taking the whole MoBo out. After I took my CV64, and my Sunrize AD516 boards out..I fully inspected the Zorro slots..and notice two caps..that had the same green fuzz..maybe they are leaking or
just bad?? ...chances are there are more caps etc. that need attention that
I cannot see at this point. :-(.
I well post macro pics of everything that I think is not "normal"..and post them.
So this Amiga repair center..do they have a good reputation?? Do they have a web site..How long do things usually take to fix..??
Well thats the latest..
Thanks everyone..
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Hello again..I just posted some pics showing the bad news..I know it takes a bit for them to actually post on the site..but they will be there soon enough..
Looks like I have my work cut out for me..If I get too deep I may have to send
my board in for repair!!
:-(
Oh well such as life right..and OH so worth it!!
Thanks
Rich
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Sorry if I failed to notice, but does your board get recognised in early startup menu?
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Vlabguy1 wrote:
So this Amiga repair center..do they have a good reputation?? Do they have a web site..How long do things usually take to fix..??
Well thats the latest..
Thanks everyone..
Hi there!
I can only tell you VERY good things about Jean Jacques...he dos some very good work at repairing Amigas, and AFAIK, he is the only one in the world (?¿) to repair Cyberstorm PPC/Bilzzard PPC boards as well..
You can check by yourself Here (http://www.amigacenter.com/)
Drop him a line, he may give you some suggestions...
Hope you can fix the machine!!!
Kind Regards
Sebastian
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vlabguy
You can probably still get a new AV module from vesalia, but I don't know where you will get a new ports module. If you find a source, let me know because I want a spare.
You may have to send the whole lot to JJ if the mobo has busted components.
That seems like a lot of failures, though!
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amiga92570 wrote:
Sorry if I failed to notice, but does your board get recognised in early startup menu?
Thats ok..Yes the board is recognised by the early startup..and says its working..
I actually started a thread, just to find out how "smart" the early startup is.
Thanks
oh and as for the replies above..I have ordered an A/V module and a
ports module. So that atleast is covered. I do however see two
caps on the MoBo that look like they have leaked or have that
green fungis looking stuff around the solder pads..Check out my photos..I posted earlier.
I can replace the silver can like caps myself as long as I get find some new ones..
But Im def. keeping JJ in mind as I might have to send it to him.
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Where did you find a ports module?
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Just got my replacement A/V board and Ports module board in the mail...
Sweet!! I hope soon the A4000T will now be able to use my CV64/ Zorro
slots...We shall see. I still need to inspect the MoBo..more closely. As I know
I have a few caps..that look a bit fuzzy..
I will try and find a source for the Caps that are bad attempt to fix myself..
or should I just send it to be repaired..or should I try the new boards with out
inspecting the MoBo??
Silly questions I know..
I may post pics of the new boards.. :-)
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@everyone
Hey. I've got a LOT of pepper from my previous employer.
Was fiddling around with some very crucial and very old piece of electronic. BE CAREFUL!!!!!
they don't want to be used the same way as when they were new.
I blew up a couple of cpu's, a hard drive, a motherboard and a whole bunch of memory modules when I was trying to ease my work. And as a result my captain went wild eyed for blowing up a couple of computers that had served their time (and I only tried to get the computers to do what they were supposed to do).
-The best-
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Will do..
thank you
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Will do..
thank you
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You can try the new modules one at a time on the Miggy, no problem.
Where did you buy the ports module?