Amiga 3000T won't boot

[tlgrooms]

Hi, did you ever figure out what was wrong with your 3000T?  I just started having problems with mine today and it is the exact same symptoms.  I have a Picasso IV and Cyberstorm PPC board in mine.  I have disconnected everything from the motherboard except for floppy and still get the black screen  Shows a video signal but no picture, just black.  Tried my Picasso IV and Cyberstorm in a desktop 4000 I own and they work both work fine so I know it has nothing to do with them.  Have nothing on the SCSI and the terminator is on the back of the machine.  I removed my battery long ago so I know that has nothing to do with it.  

I screwed up the boot track on my UW SCSI drive and was trying to get back up and going by booting with 3.1 floppys (all I have and a scsi drive).  Was trying to get 3.1 to recognize my SCSI CDROM so I could get to my 3.5 install CD and reinstall 3.5.  All of a sudden my machine quit showing the insert disc screen and has been black ever since.

Anyone that could help with suggestions, I sure would appreciate it.

[tlgrooms]

Orange,

Not the battery on mine, I removed it a long time ago before any trouble began.

[tlgrooms]

Orange,

Machine was booting fine from floppy until last night.  I hooked up an older SCSI CD-ROM drive that I used to use on the machine to the built in SCSI on the 3000T motherboard.  Booted several times from floppy and was never able to make hdtoolbox see the CD-ROM drive.  Tried changing termination, scsi id's etc and somewhere along the way the machine quit booting.  So, I pulled all the cards and took the scsi cable off the motherboard and still nothing.  Removed the Cyberstorm as well and went all the way to nothing but the built in video connector, same thing.  When I power on, a video signal is detected but the screen stays black and the floppy never starts clicking like its trying to boot, no boot screen.  So, with nothing but the bare motherboard and the floppy hooked up and video plugged to the motherboard, nothing but a black screen.  SCSI on back of machine is terminated with the terminator that comes with the machine.  SCSI Cable inside is completely disconnected from board.  My ethernet, picasso iv, cyberstorm cards are all OK thank goodness as I've put them in my 4000 desktop and they work fine there.  Man I wish I had created an emergency boot floppy and made several backups.  This has been a nightmare and I still can't get the machine to boot.  I own many Amigas but my 3000T has always been my favorite.  Bought it new shortly after they came out.

[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.

[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.

[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....

[tlgrooms]

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

[tlgrooms]

Don27Dog, tried removing cyberstorm and changing jumpers, still no change.
I tried my cyberstorm and picasso iv cards in my 4000 desktop and they work fine there.

[tlgrooms]

Never did get it going.  Going to drag it out again one day soon and start troubleshooting all over again.  If I remember correctly, when I turn it on my monitor goes to a black screen (video signal present) and the green LED comes on and stays on solid.

[tlgrooms]

Well I'm back again and after almost 5 years trying to get my 3000T going again.  Can anyone tell me what happens if the keylock is bad?  Would this cause the machine to come on to a black screen with a solid power light?  That's what mine does, hard drive light flickers ever so lightly (with no drives hooked up) and power light comes on and stays on solid.  Do I just wire the 2 wires together to bypass the keylock?

[tlgrooms]

Thanks for responding.  Going to try checking the voltage on the power supply again tonight since I am going to have access to a working multimeter.  I'll post here later what I find out.  I don't guess anyone makes a power supply converter for ATX to 3000T.  I know there is one for the 3000 Desktop.  I also have my original 3000 Desktop and it is working so I have been  able to swap all the cards and chips out with it and know that they are still working.

[tlgrooms]

Checked the power supply both under a load and with nothing but the motherboard hooked up.  It isn't the power supply.  There is no battery damage, I removed the battery long ago when storing the machine and never replaced it.

[tlgrooms]

I swapped every socketed chip one at a time that I could except for the zips.  None of it made any difference.  The 3000 desktop still worked fine after I swapped the chips.  I moved them all back as they were originally after I finished checking them.  I have not pulled all the zip chips out of the 3000T.  I guess that will be my next step.