Apple //e Disk Loading Problems

[Mr. Macintosh]

Hi there, I'm relatively new to the forums but thought I'd come to you with this problem.

So I just recently got an Apple //e off of eBay and was super excited as it came with loads of software and stuff. After cosmetically cleaning it I decided to test and see if the Duodisk it came with worked. I hooked everything up, the computer made a startup beep and the Duodisk did it's clacky thing and the drive indicator light came on. After cleaning the Duodisk I inserted a ProDos floppy into the drive. The computer then displayed the ProDos splash screen and then went to "Relocation/Configuration Error" and the drive turned off.

I ran a self test (solid apple + control + reset) and I was met with a message saying "RAM 00000001"

I repeated this process several times, and the result is always the same, by the way this is an Apple //e Enhanced.

If anyone could help me get this computer up and running I'd greatly appreciate it!

 

[trash_44fr]

Hello Mr. Macintosh,

The autotest is clear : 1 RAM chip (the rightest most on the bottom of the motherboard) is dead. See the FAQ here.
You need to change it. I hope the chip is in a socket. If not, you have to unsolder it.

 

[mwlay]

Hello Mr.Macintosh,
I know the problem. The 1first RAM chip (4164 or 8164) on the left side, next to the power supply is broken. You must replace the chip. If he puts on a constitution, it is easy. Otherwise, you must desolder the chip.

 

[Mr. Macintosh]

Haha sorry Trash-44fr, Mwlay was right. I removed the leftmost RAM chip (that little devil was soldered in) and I replaced it with a brand new socketed 4264 chip. After that the computer now works like a charm! Thanks for your replies, I made a little video of the working computer here: http://m.youtube.com/watch?v=MltSXN23VNU

 

[lanmangler]

And five years later, I have a RAM 00000010 test result on my 1984 board. So I must replace the 2nd from the left while facing the computer?
(Soldered, thought I'd make sure...)

 

[david__schmidt]

Correct, if you were only going to replace one. But you've experienced one failure already - chances are really good you'll have more. Deslolder them all, put in sockets, and replace all chips. Maybe start with the bad one to ensure you're actually improving things.

 

[lanmangler]

Thanks for the reminder on socketing, - looks like i have to locate some as i seem to have a few misc, but not enough for the full job.