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Just to complete this problem I had. I got the RAM and also the low profile sockets. So I put the socket and then inserted the RAM. I discovered to my dismay that the MRD7 position is right under the floppy drive profile and (despite the low profile of the socket), when I inserted a floppy...

When I turned off the monitor, I noticed a strange shape of the light point in the video, so I immediately thought of a vertical deflection problem. I searched a bit in the monitor's electrical diagram (actually I just followed the tracks of the trimmer that deals with the vertical dimension)...

Hi guys. After realizing that my Apple IIc has some RAM chips to change (I have an open thread here for this very reason), I realized that its original green phosphor monitor also has some problems. The monitor is a product intended for European use, so it works with 220V. I'm sure that the...

Update: I got the slim profile sockets (that way when you put the RAM chip in it won't touch the floppy drive that goes on top of it). I'm just waiting for a set of RAM I ordered. I'll update when I hear back, thanks for the advice.

How did you desold the ram chips? Did you use hot air? Or a soldering iron tip suitable for 16-pin chips?

I found this diagram on the internet, and it corresponds exactly to MRD7 that you mentioned. Thanks I remember some time ago that I had an Atari STacy that didn't work and I suspected that it was the faulty CPU. So I ordered a new CPU and, since it wasn't socketed, someone told me to place it on...

Hi everyone, I got my hands on an Apple IIc. I tried to turn it on and I get a screen with strange characters on the screen when I turn it on (see photo). I read various things to do online when this happens (it seems like a problem with some RAM chip). So I burned an EPROM with the ROM 3...

Thanks bibilit, it was exactly that pin that was stuck and wouldn't move because of the old grease. I cleaned and oiled it and now it works perfectly!

Yes, I tried with a multimeter. The switch when pressed by the White cam, the contact is open. While, when the White cam no longer presses it, the contact is closed (the multimeter indicates continuity). Basically the motor stops working when the White cam presses that switch again. To have the...

Hi all, I finally managed to buy a Macintosh 512K with its external floppy drive (Model M0130 400K). The problem is that the internal mechanism that holds the floppy disk is constantly lowered (as if the floppy was already inserted), and with the upper felt arm that touches and presses...

One important thing is to enable ip forward by putting the following line in the file /etc/syslog.conf: net.ipv4.ip_forward=1 on both Linux and Mac systems (e.g. iBook G4)

I found a photo of a cover we had done. The work hadn't come up that much.

Hi everyone! I'm really happy to see this thread all dedicated to my covers;) I have to say that I didn't expect it and I am very pleased to read everything, including suggestions and what I should do to improve them. Before putting my girlfriend to work with her sewing machine, I thought a lot...

Thanks bibility, I changed the Optoisolator and it worked. Thanks to you too AndiS; now i have a more general idea about this problem.

thanks, tomorrow I'll try to replace it with a card that I already have recovery. In fact I have tried the hd on another macintosh and it works perfectly.

or is it in the hd controller?

Thanks for your answer. Could you tell me where it is?

I recently performed a recap of the capacitors of the analog card of my Macintosh Classic (the critical ones); all right for the first few seconds from power on: load the operating system correctly from HD Quantum 20 MB SCSI (the original Macintosh Classic to be clear). After a few minutes the...

I used isopropyl alcohol when I disassembled the drive for a more thorough cleaning but it never convinced me that this could be the cause of the problem. It looks like that damned disk brought the floppy drive head out of alignment. Generally this is possible, but only in the writing phase when...

I have a problem with the floppy drive .... I have many HD floppies and I would like to try to make a selection to understand which are still usable and which are not. I started to format them with a Power Macintosh 7200 ... all right ... some working floppy and some floppy with some bad sector...