Dead 2000

[curtis]

Finally got my 2000 back on the workbench and now it won't boot.

My symptoms are a black screen and 10 short blinks and 1 long blink on the power LED.

I've swapped out both the cpu and the ROM for known goods and no joy.

Checked voltages on the power supply and they're good.

I've got an Indivision installed and I don't even get the "splash" screen from it.

Suggestions?

Oh, it's a rev 6.2 motherboard.

Right now there are no boards installed at all.  It's basically bare metal with only a floppy drive.

[curtis]

@amiman99  Guess I'll have to find some DRAM chips and give it a whirl.

@JuMa  Tried that several times.  No joy.

@scuzzb494  Repeated power cycling doesn't do anything.  Double checked the INdivision and no joy there.  Firmly seated.

Looks like amiman99 has the right idea.  Now to order the chips!

Sigh...

[curtis]

has the battery leaked?

Battery is long gone.

[curtis]

Don't where you got green screen.

My startup screen is BLACK.  Just like nothing is firing.  Not even the Indivision splash screen.

And replacement RAM chips are on the way.

[curtis]

Guess this thread will go dormant for a couple of weeks while waiting for the chips to come from China!

Stand by to stand by...

[curtis]

Wish I had an o'scope to do some of the testing mentioned above, but I don't.

Agnus has been replaced with a MiniMeg.  Tried pulling it and replacing with a 1MB Agnus with no joy.

[curtis]

Tried the J200 switch.  No change.

[curtis]

That's the way I test.  Always.

Have you tried it COMPLETELY bare bones?  No Indivision and no floppy.. just the PSU, motherboard and video output (B&W composite if you don't have compatible monitor)?

[curtis]

Don't have an o'scope.

Could it be that the crystal driving the processor is not connected properly or defective?
 
 Long shot, but if you have a scope to check the crystal outputs / tick signal, and it isn't giving Mr CPU any timing signals, that might explain why the Amiga thinks it doesn't have a processor?

[curtis]

Welcome to my horrible, terrible, very bad day!

Well, well. Looks like my A2000 died as well. First random freezes then just black screen. It has vampire intsalled. I removed vampire and installed 68k and rom. Now at power up it goes normally to insert floppy screen but when starting to load a game it freezes. If reset after that it (sometimes) goes to green or red screen and resets itself.

[curtis]

Trying not to!

BTW, just swapped out both CIA chips.

No change.

Sure hope those RAM chips get in soon...

Don't jinx us other A2000 owners!

[curtis]

:destroy:  :python:  :flame:

Ok, you indicated that you didn't see the Indivision splash screen so that led me to believe it was still there.  At least we can say why you don't see it... because it's not installed :roflmao:

[curtis]

Okay,the RAM chips came in.

Placed them very carefully and snugly over the originals and fired it up.  Nothing changed.  Also, none of the chips seem any warmer or cooler.  All about the same temp.

Tried 4 different cpu's, all known good, and got the same result.

Tried the Caps Lock mentioned above and got to 6 or 7 and it stopped responding.

Summary:

1.  Computer has ONLY a Indivision ECS installed as I no longer have a monitor that can display Amiga natively.
2.  On power up I get 10 short blinks and 1 long blink on the Power LED.  Nothing else.  No other sign of life.
3.  So far I have replaced BOTH CIA chips, the cpu, Agnus, and doubled checked all jumpers including swapping the TICK to the display instead of the power supply.

NOTHING IS WORKING.

I do NOT have an o'scope so I can NOT check signals.

Suggestions?

Thanks,

Curtis

[curtis]

IF I had a composite crt, I would be happy to do that.  Unfortunately, I do not.

Take out the indivision and connect the composite b&w to a TV.

[curtis]

Well, I tried to utilize a machined pin socket and plug that into the cpu socket, with the cpu, and it didn't change a thing.  Really starting to get exasperated with this thing!