Recent content by Virtual Davey

I had seen in a video that if the "glue" on the flyback is brown (not yellow like it should be), there could be an issue. Also if you look at the flyback in complete darkness (while the unit is on) and you see "blue sparks" flowing inside of the flyback, that could also point to a defective...

Looks a little more orderly and tidy in the enclosure now. Light is working again too. Biggest issue was mounting the drive and power supply securely. Tried many things but ended up using strong mounting tape.

I was restless this morning and put something together that looks as though it came straight out of Fallout. It's a tight fit, and I need to complete some safety measures before I seal it up, but it works. The light on the on/off switch no longer illuminates when it's on, but I believe that was...

Yes, that purple wire should normally be connected, but in that photo it is not (I have the board removed). It's connected properly however during testing. The hard drive has been working flawlessly while connected to a different power source outside the enclosure but if it does eventually die...

I connected the drive using an external power source (see pic). Started right up, mac responded (2nd pic). The voltages coming out of the ProApp's enclosure power connector to the drive fluctuates all over the place. 12v, 19v, 25v up & down, etc. The board is faulty. Can someone direct me to a...

I have this ProApp 20S external hard drive for my 1984 Macintosh Plus All-in-One. When I plugged it in and turned it on, it began to smoke profusely after 10 minutes or so. I opened it and noticed it had 4 RIFA capacitors, and at least 1 was blown. I changed all 4, light on the switch goes on...

I replaced the capacitor at C1, no change. Felt like giving up at that point. Then I replaced the 4N35 at U3...and it came to life! I'm also getting the proper voltages on both the 5v and 12v lines, and the floppy drive is back to normal. I want to thank all of you for your help during this...

I purchased the ECW-F2395JB and the 4N35 from DigiKey but I had forgotten to add the Zener Diode (1N5349BRLG) to my cart before checking out. It has since been shipped and I'll receive them next week. Instead of ordering a .45 cent Zener Diode at DigiKey...

Thank you, I was unaware he had listed a parts list. I see the replacement part you listed (ECW-F2395JA), but when I put JDW's part number into DigiKey's search bar I get this replacement capacitor: ECW-F2395JB...

I'm getting 7.44 on the 12v line (using the multimeter settings davidg5678 recommended, "black 20" on the multimeter dial). If I put the dial on the "red 200" setting I get 6.2 on the 5v line and 15.6 on the 12v line. Just like before, the voltage dial does nothing to change it. Sorry, I'm still...

Yes, that picture of the logic board was when I first removed it. It's very clean at this point. I also cleaned all removable chips and ram. Analog board was filthy too, but has been cleaned, joints resoldered, and all electrolytic capacitors replaced. It ran for an hour (after just changing the...

No, I do not have a bench power supply. I don't know if this will be of any help, but I tested the voltage coming out of the external floppy disc connector with my multimeter and it comes up as 6.2 volts. It's been years since I've used a multimeter, so I attached a picture (just in case my...

Brought all rusty grounds to bare metal. Removed the old solder joints from all cables running from the analog board (J1, J2, J4). Did the same to the flyback. No change. Floppy drive is spinning, tube is not turning on, crackle sound from flyback. I looked up the troubleshooting for a...

Thank you, yes I started by replacing all 3 RIFA capacitors. That's when it sprung to life and ran well for about an hour. Then I turned it off and on a few times, all was still good. But then it happened. I turned it on and I heard no beep. Monitor wasn't on, but I heard a spinning noise. It...

I've been forwarded to this forum for advice on a Mac Plus All in One I acquired recently. I've been told from the picture of your motherboard, it's definitely a Mac Plus, was likely a 512k once, but it's been upgraded. When I first tested it it would operate properly for about 5 - 10 minutes...