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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: mrtabaka on March 08, 2006, 01:19:43 PM

Title: Black screen booting A3000T 030
Post by: mrtabaka on March 08, 2006, 01:19:43 PM: Hello, when I boot my A3000T with 030 I have black screen:(Monitor turns on, but the screen is black, I can make reset from keyboard too, but screen still black. I don't have any Zorro cards installed. Somebody can help me?:((((..Regards.
Title: Re: Black screen booting A3000T 030
Post by: motorollin on March 08, 2006, 01:27:28 PM: Can you get to the Early Startup Control screen?

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moto
Title: Re: Black screen booting A3000T 030
Post by: mrtabaka on March 08, 2006, 01:29:11 PM: No, I can't.
Title: Re: Black screen booting A3000T 030
Post by: motorollin on March 08, 2006, 01:36:10 PM: Hmmm, well I think I am correct in saying that if you can perform a reset using CTRL-A-A then the CPU is running. Can you disconnect all your drives and any other peripherals not required and then see if you get the kickstart screen?

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moto
Title: Re: Black screen booting A3000T 030
Post by: Reynolds on March 08, 2006, 01:43:11 PM: Another question: which video connector is in use? and if the VGA is, then is it enabled or disabled...

Reynolds
Title: Re: Black screen booting A3000T 030
Post by: mrtabaka on March 08, 2006, 02:04:05 PM: I'm using VGA out, I will check if it's enabled, I will also put away hdd etc. and look what will happen. I will try it friday (job)and say if it work. Will see....
Title: Re: Black screen booting A3000T 030
Post by: motorollin on March 08, 2006, 02:17:34 PM: Please let us know how you get on :-)

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moto
Title: Re: Black screen booting A3000T 030
Post by: Ral-Clan on March 08, 2006, 05:35:14 PM: On my desktop A3000 I have noticed that sometimes SCSI termination problems result in the Amiga turning on, but only giving a black screen (i.e. acting dead). Try plugging / unplugging devices from the external SCSI port on the back (not while the machine is on). Try using an ACTIVE DB-25 SCSI terminator on that external port. Try terminating your internal SCSI devices, or remove all SCSI devices entirely. Lastly, disable the onboard SCSI and see if you can get it to turn on (is there a jumper to do this?).

Please post your results to let us know how it works out for you.
Title: Re: Black screen booting A3000T 030
Post by: mrtabaka on March 13, 2006, 08:03:57 AM: I tried disabled scsi, checked vga,replaced PAULA< DENISE< CIA A and B, remowed 1mb CHIP in ZIPs and no changes. Today I put A3000T to service, may be they repair my Amiga..I will inform You.Regards

http://www.dbline.it/faqs/toaster/amicolor.html

Here we can read that black screen means NO CPU, but my 68030 is on motherboard..
Title: Re: Black screen booting A3000T 030
Post by: MrZammler on March 13, 2006, 12:54:37 PM: Was there by any chance an accelerator card before in the 3k?

Check that the jumper settings are ok for the onboard 030.
Title: Re: Black screen booting A3000T 030
Post by: mrtabaka on March 15, 2006, 12:15:32 PM: I got back my A3000T from service,they didn't fix it (but they didn't want money too - answer was that all seems to be ok(resistors etc.)),I replaced DENISE,PAULA, CIA A and B, GARY and nothing changed:(I don't know whether there were any other cpu cards but jumpers are ok now. VGA is ok (31,1khz 50hz PAL and 31,1khz 59 NTSC),so the output is ok I'm think. Coputer don't react on floppy..hmmmm..some other ideas????:(
Title: Re: Black screen booting A3000T 030
Post by: rrete on April 11, 2006, 11:52:54 PM: HI!
I've the same problem with an A2000 rev 4.5 of my Amiga collection. I'm looking for the solution, but I think that the problems comes for a bad track or soldered point near the processor (pins) or battery (in a2k there are very near). In my a2k the battery lost acid and two tracks were broken. If I found the problem i'll post it.

RRete

A500(3),A500+, A2000 rev6, A3000, A4000 060, CDTV, A600, A1200 HD.
Title: Re: Black screen booting A3000T 030
Post by: TjLaZer on April 12, 2006, 12:18:40 AM: I had a similar problem with my A3000T. Even thought I removed the battery (installed a Lithium hack) when I first got it (It didn't leak as far as I could tell at the time) Apparently it did leak some as right under the path of the battery there was some corrosion and green streaks on the traces. I tested and found a trace was eaten so i repaired it and my A3000T finally worked! Check to see around your battery for broken traces. Good luck.
Title: Re: Black screen booting A3000T 030
Post by: Tahoe on April 12, 2006, 08:30:00 AM: Black screen "booting"? You mean it does start but you get no video output, or it doesn't boot at all?

I had the same thing, everything looked fine after removing the battery, but it wasn't. Power led remained dim. I had to solder 2 tracks on the board to make it work; which it now does!
One of the lines went to the 68882 FPU.
Title: Re: Black screen booting A3000T 030
Post by: stopthegop on April 12, 2006, 09:19:16 AM: Hello
Forgive me for mentioning what may seem obvious, but did you check the contrast on your monitor? When I was a kid I used to turn the contrast all the way down on my dad's Apple II monitor as a prank.. :) Not sure if you have kids? But its not impossible that the contrast "changed", one way or another, while you had your back turned. Good luck, Dave
Title: Re: Black screen booting A3000T 030
Post by: mrtabaka on April 25, 2006, 11:47:14 AM: Now I put my A3000T to other service. I found some burned tracks, so maybe they will fix it. Will see..I let You know;)