Did I kill my A2000?

[KatManDEW]

I got the Megachip for my A2000 and installed it, but I had no video display. I reinstalled the original one meg chip, but still no display :boohoo:

It still boots, but no display.

I took a shoe off to ground myself while working on it. I used magnifying glasses and checked all the pins on the chip and in the socket and they all look OK.

Am I hosed?

[KatManDEW]

I cleaned the chip and socket pins with some wizz bang, super duper contact cleaner that I got off the net, and my display is back!

But I lost DH0 in the process. It wouldn't boot from hard drive, so I booted from floppy, and DH1 is still there, but no DH0.

Funny thing is, that with the Megachip in there, it says I only have 437,592 chip mem, and 18,543,528 other mem. I had 885,720 chip mem before, and I only have 16 meg on my GVP 040 card....

But I just added 12 meg to the GVP card, so maybe that's screwing with my chip mem?

Edit: This megachip board I got doesn't have a jumper wire hanging off it, like I've seen on other megachip boards???

[KatManDEW]

Gilloo wrote:
We need your motherboard version...

All is explained here:
http://amiga.resource.cx/manual/MegAChip.pdf

Ahh Haa! That is exactly what I needed. I'll will check that out this evening.

Thank you very much!

[KatManDEW]

I remember replacing the 512k Agnus with a 1 mb Agnus, many many years ago.

My Megachip board does not have a black lead with a croc clip, like the ones I've seen in pics. I'll get a pic of mine and post it tonight.

Is there a way to post pics here on Amiga.org? I've been putting them on my website and linking to them here on Amiga.org.

[KatManDEW]

Here's a pic of my Megachip board. It has two holes in the back of the board.



I've gotta dig around and find my motherboard revision...

[KatManDEW]

I found the revision number on my motherboard. It's revision 4.4.

I read that Megachip PDF several times, and I don't see any way mine is going to work without the black jumper, which is noticably missing from my Megachip.

Does anyone know what I can do about this?

Mine doesn't looks axactly the same as the DKB Megachip shown on the Big Book of Amiga Hardware

This is the DKB version;

[KatManDEW]

zipper wrote:
Yours is a MegiChip.

OK. That makes sense, kinda... According to the Amiga Ahrdware Guide info, it should have two wires that go to a socket for the Gary chip.

http://www.amiga-hardware.com/showhardware.cgi?HARDID=985

I got it from SoftHut, and it came with no wires or socket :boohoo:

Thanks for the info.