amiga 1000 boot problem

[David Wright]

I just purchased an Amiga 1000 which doesn't have a keyboard yet.

I made a kickstart 1.3 disk to start with and inserted at the graphic prompt.
It begins to read and access data on disk, runs fine for about 10 seconds at most, then just quits, monitor goes dark or stays dark while booting. Then monitor loses video signal.

Any ideas?

[Oldsmobile_Mike]

Same maintenance as anything else. Clean and reseat all socketed chips, boards (including the RAM board in the front, if equipped), tighten any loose connections, check for leaking or damaged capacitors, etc.

Have you confirmed that the monitor and monitor cable work correctly on another system?

[David Wright]

Monitor works fine on others and does display insert kickstart screen on this one. Only drops signal after 5 seconds of loading disk.

I am also going to take a look at floppy drive.

[paul1981]

Sorry to state the obvious, but have you verified the disk to be good or tried a different disk?

[arttu80]

I would check power supply on that also. Insufficient power output after warmup?

[David Wright]

I would check power supply on that also. Insufficient power output after warmup?

I wrote a new kickstart disk again, verified disk.

Power supply? Maybe, not sure.

Tried again with new kickstart. It is a good 10 seconds of solid access and reading, then just when it stops and seems that the insert Workbench disk prompt should appear, signal to monitor stops and blank.

As crappy as the case was taken care of on this, the motherboard and capacitors look brand new. Even the shielding was spotless. I tried reseating and chips etc, but still nothing.

[David Wright]

It was the NEC lcd after all, which did show boot screen but no further. Also is good with other Amigas.

Hooked up to my 1084 which i never use and all good.

[puppypc]

Hi David, did you ever figure out the problem here? I just bought two NEC Multisyncs as well, and have verified that they both work fine on my A1200.
However, when I use them on my A1000 I get a similar result: The screen initially comes on, but after loading a little of the kickstart everything stops. I'm using a floppy emulator, so I can see that it loads to about track 24 and then hangs; If I switch to Workbench or any other disk image, the Amiga doesn't even try to access it after a soft reboot.
I have only tried a little troubleshooting, I plugged my TV into the A1000 at the same time (the LCD monitor is on the 23-pin, the TV is on the A/V pin and is what I have been using with this computer for over a year)
With both plugged in from cold-boot, I see the initial white/gray screen, then the LCD cuts out, and the TV's screen turns black with two thin lines in the middle: a red and a green
I *have* found that if I leave the 23-pin cable unplugged, load Kickstart and Workbench, the computer works just fine (as it always had since I bought it), then once that's finished I can plug the LCD monitor in and everything seems to be fine. This does not sound like a good solution, and I can only imagine something must be going wrong internally.

Anyway, hope this extra info helps anyone solve the problem.

[David Wright]

Seems to me to be a sync issue with monitor or rgb to vga convertor.
I have the 1000 still on the 1084 with no issues.

[kneehighspy]

had same issue with one of my a1000s, have you tried earlier version of kickstart?

after all various troubleshooting, still turned out to be bad floppy disk only.