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agent_js03

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Everything posted by agent_js03

  1. agent_js03

    Macintosh Color Classic repair adventure

    You're right bibilit, it is a 10uf not a 100uf. For that one, I cleaned as much of the old solder as I could. There was some that was sticking there and wouldn't be removed.
  2. For anyone who cares, I found that the CRT will in fact work with my powerbook, but only if I put my powerbook to sleep and then wake it up with the monitor still plugged into VGA.
  3. Hi all, I have a Macintosh PowerBook 3400, which has an actual VGA port on the back. I have tested this VGA port with a modern LCD monitor and can confirm that it works perfectly. However, I wanted to use it with a CRT monitor, which gives a more classic, nostalgic retro feel. I have two CRT monitors in my garage. I have tested them both with PCs and can confirm that they are both working. However, when I plug them into my PowerBook's VGA port and start up, it seems as if the PowerBook doesn't even recognize them. The screen does not come on, and there are no resolution options or anything for the monitors on the settings in Mac OS 7.6. The only noticeable physical difference between the VGA port on my LCD versus the built-in cord on my CRT monitors is that on my CRTs it looks like three pins are missing on the port, compared to the LCD in which the port contains all of the pins. I have looked into this on the Internet and have found that these pins typically aren't used in VGA, so it seems unlikely that this would be the problem, unless the PowerBook has some weird circuit that depends on these pins to detect a monitor present in the first place... Does anyone have a remote clue of what the problem is that I am experiencing and whether some adapter or something would solve the problem? Thanks in advance.
  4. agent_js03

    Macintosh Color Classic repair adventure

    Thanks for the reply, techknight. Were you referring to the area around C9 I was talking about? Or were there other places you saw in the photos that look like trace rot?
  5. agent_js03

    Macintosh Color Classic repair adventure

    Here is another closeup, this one of C6. This is the last picture. Sorry, this one is very blurry. This is a closeup of the single 100uf 16v cap. This one was the tiniest capacitor. I had to solder it on its side because it was so tiny I couldn't hold it in place and solder it face down. It clung to the solder pads fine. I notice there is a lot of orange around the contacts... I think there was some corrosion there. As far as I could see, the pads were all intact. I used a solder sucker to remove the solder when I took off the old caps.
  6. agent_js03

    Macintosh Color Classic repair adventure

    Thanks guys. I ran it through the dishwasher and now it is all shiny and clean. I will try it again next weekend (that should give it time to dry). Here are the pictures (before the wash): Here is the area I was talking about around C9, where the green layer was chipping off of the copper circuit beneath: Here is another area of concern I talked about. There was a lot of leakage around C3. Notice the very dark colored leads coming from that cap. I am worried that there is corrosion beneath the green silicon coating.
  7. agent_js03

    Macintosh Color Classic repair adventure

    I have pictures but am having a hard time figuring out how to put them on here. I feel a little silly. Can someone help me out here? I think you guys have a point, the board is pretty dirty. I was reluctant to run it through the wash so I just rubbed it down with a cotton tip dipped in rubbing alcohol. If washing it is what it takes, I will do it. To be honest the PRAM battery is probably also dead. I know that others have talked about this being the issue for their CC. Unfortunately I do not currently have access to a good pram battery. I was looking to see if I could just replace the whole board, on eBay there are boards selling for between 130-200 dollars. That's ridiculous. I am unwilling to pay that kind of money on a 23 year old machine that maxes out at 10MB RAM. It's not worth it.
  8. agent_js03

    Macintosh Color Classic recap concerns

    bibilit, that is perfect. Thank you very much. It looks like the leads were probably not interrupted on my board. I will proceed with the reccap as soon as my capacitors come in the mail...
  9. Hello all, I recently bought a Macintosh Color Classic from a woman who had a classic mac collection she was trying to get rid of. I didn't pay very much for it, fortunately. She assured me that it was tested and working. When I got home I tried to power it on (yes, I used the keyboard) and found that I had been lied to. Oh well. I went through the steps to try and get it working, no go. When I looked at the board, I saw very clearly that there are signs of capacitor leakage. So I ordered some tantalum capacitors and busted out the soldering iron. Right now I have begun removing old capacitors from the board, haven't begun soldering on the new ones as the capacitors haven't come in the mail yet. When I removed C9 (near the "front" of the board where it plugs into the wiring harness) I noticed that the top layer of the board has begun to chip away. When I removed solder from the pads that the capacitor rested on, green chunks of the top layer blew away. I cannot tell if any leads were lost. I don't think so, but I am not sure. I am wondering if anyone has closely documented their recap experience with a color classic and happens to have pictures of the board without the capacitors on them, so they can show me what that part of the board is supposed to look like. Maybe I can gently expose the leads and solder a wire back into the place where they went before. I will try to recap as planned... If I don't succeed, I guess I'll have to keep my eye out for a new logic board. It's hard to find one on eBay for less than 50 dollars these days...
  10. agent_js03

    Macintosh Color Classic recap concerns

    Thanks bibilit... I was wondering, could you take a high res photo of the capacitor section in the bottom right corner of that photo? I need to be able to see the leads in the circuit...
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