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Laughing my ass off. As you said - not lethal. I've been shocked MUCH worse believe me. My mistake was in grabbing the case to get leverage - put my thumb on the ground screw. Stupid does not even begin to describe... So got what I deserved. I knew I was taking a short cut - won't do it again.

Mac128 - if you know of a source of flybacks, point me there - I'll buy one just to see if I can revive the board. I did re-work the flyback connectors... The trick of flexing the power/sweep board was very flakey - I'm not sure if there was another loose connection and it was a combo of...

equill - thanks for the thorough explanation. I did go back and retouch the key solder points. Getting each point to flow and, where necessary, touching up with new solder. Probably not to the level of detail that you specify. In any case, I believe I have localized the issue to the Flyback...

Update: Watched a quick youtube video (or two) on how to solder electronics boards. Got my solder out and practiced on an old motherboard that I had lying around - then went and hit the main components (culprits) on the power/sweep board. Used new solder at most joints - hit about 30-40...

Equill: Thank you. I was thinking the same thing after reading that document. When the unit is started cold, it starts right up. Once she warms up, an electrical buzz is heard, then she shuts down. Flexing the power/sweep board gets temporary power back and she turns on for the amount of...

All: I received the 512K late yesterday. A few things: 1) It's had the Mac Plus Upgrade - 800K internal drive and 128K ROM 2) It starts but it quickly shuts down... as though there is a short in the electrical supply. I cracked her open and found that if I flex the analog board a little...

It amazes me how many vintage Macs have been upgraded in some way. You have to pay close attention to what you're buying... Check out this Mac on eBay... being sold as a "Mac Plus". http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=230320233103 Lumpy

So I checked in with Mactarkus. It turns out he is one of the two hosts of retromaccast.com - very nice guy. He double checked his Mac 512K/HD20 and found that his 512K was not stock. It had 1MB of RAM and an 800K floppy. He was guessing that the ROM was likely upgraded too. So, it looks...

I e-mailed him. We'll see.

Mac128 - Agreed on the MacEnhancer - I was wondering - how did Microsoft keep up with new drivers as new printers were produced? Maybe it was not necessary? The software may have been primarily for switching ports... Another 512K running system 6 with an HD20...

Equil and Mac 128 - Thank you. Once I get the 512K in my possession, I'll let you know what I find w/regard tot the ROM. If I do have a 64K chip, I may try to get ahold of a 128K ROM to experiment with - it would be nice to not have to use the HD20 Init disk - and also have the ability to run...

Equil/Mac128 Some interesting comments on you part. I've done a lot of research and have some similar questions about the ROM chip in my (now in-transit) 512K A few things: 1) The woman that I bought the 512K from said she did not think it had been upgraded - yet, she did tell me that the...

istar - good info - thank you. I just also purchased an HD20 on eBay. It has a later/supported Mac 512K OS on it and includes the HD20 Init disk... So I should have a few options to boot from. The HD20 also comes with a bunch of programs already on it... Should be fun. Regarding third party...

I ordered this battery from Radio Shack: http://www.radioshack.com/product/index.jsp?productId=3249777

Thanks for these responses.... Some additional information. Apostrophe - thanks for the tip on the torx screwdriver. I'll get one. With regard to the battery. My understanding is that there is one on the logic board - I purchased a replacement for that battery - so yes, I need to open her up...

Hi: My first Mac (actually my first computer) was a Mac 512K - I took it to college with me and used it for four years - a great Mac that served me well. I took unreal good care of it - stored it a my folks... and they tossed it 8-o . I eventually went to Business school and that required a...