I have a spare 1400 active matrix display assembly. I may even have two, I gotta check.

techknight said: Oh dear gosh..... Click to expand... lol Removed the chip with Chip Quik and used 30 AWG wires. Just have to wait for a new IC now.

Is the ROM on a socket or soldered in?

CTRL-RESET doesn't drop me into BASIC. It just restart over again (like a power on) Thanks very much for the explanation Gorgonops. I found a ROM replacement on ebay. I'm gonna tr…

Some times, you just got to say "Phucket! It works!" Now that you got it working, you can go back when you are up to it and replace the thick wires with thinner ones.

Oh dear gosh.....

WoW...that's one original soldering technique there! - ive done a bit of heavy jumping on boards, but I rekon you should take off all what you have done, clean the board a few ti…

Sure     I apologize for the unorthodox soldering as I realized only afterwards that I should have used smaller wires. But everything is connected.

one time.    lol out of all the SE/30 boards i have recapped,  was the actual scsi chip bad.   but it was the same situation, the pad's metered out good... i flowed on a new scsi c…

can you show us a picture of the scsi chip on your main board?

I'm Back. I tried with two different drives, but as they are old I cannot trust them. So I bought a new one from maccaps.com thus the delay in my answer. Same problem with the n…

I think the jury is out. Click to expand... Nice one!  It is... I have gotten the schematics though, and I will start sorting through them. I have some PB1xx's that I am re…

I had a Quadra 700 in 2007 I got from the high school I was in at the time. It had a Farallon 10baseT transceiver like one of the ones mentioned here. Had Mac OS 8.1 with Apple Bui…

I think the jury is out.

Juror22 - any luck on this?

I think you got it spot on, Gorgonops. With a stuck bit counter, it would not access the ROM properly.

I worked admin years ago.  FreeBSD from the command line.  Then linux from the command prompt.  No GUI yet.   Every time I updated apache, sendmail, you name it, I would break the …

Pitou said: I'm not able to get into Applesoft BASIC using ctrl-reset. I also tried running BASIC from a system disk. Click to expand... The "ctrl-reset" is what you use …

It's OK. Pin 1 on most ROMs (up to 64K) is either ground or +5v, and about 24 pins. 128K, 256K and 512K ROMs Pin 1 is usually an address pin, depending the ROM size. They are to up…

@Elfen, oh I'm very sorry, I was talking about pins on the ROM, not the Mega II. Sorry again for the confusion.

If you can get your hands on a polarized light source and the right optics, under polarized light conditions, a corroded trace should look different than a normal trace, even if th…

The Ensoniq 5503DOC does not produce "classic" 8-bit Apple II sound. The clicker speaker logic is located in the Mega II. This is why when you use a stereo sound card, you don't ge…

The address/data bus to the MegaII VLSI is dead on, otherwise you wouldnt be able to generate any legible characters.  The chip very well could be bad. But it would be odd, but no…

Pitou said: I already checked all pins with an oscilloscope. Continuity is good. Signals seem to be on all pins except for 1,2,4 and 6 if I remember correctly. Again, I'm not…

Fix it please!