OK well that is interesting. Would still really appreciate your post... I was wrong: my 5300c powers on without PRAM battery with the new power boats... which may not speak to w…

Batteries made no difference either way in my cases.

And let me also ask this: my 5300c had a dead PRAM battery. It usually starts fine. Initially, I thought I had noticed that it would not start at all without the dead battery c…

I'd be really appreciative if you could send me a link to the topic. Until I'm sure a power board is working correctly, I'm not sure how much else I can do/diagnose.

There was a P4 toshiba laptop designed the same way, the DC-DC board was bolted on with one of these, and it always caused problems

The whining of the power board I talked about on the other recent 3400 thread. The caps are bad. Replace the 2 caps and that should disappear. The pop and non screen come on has…

I'm sure this isn't totally new, but I'll describe the chain of events specific to this PB. I bought it on eBay untested.  There wasn't that much corrosion on the board.  I remove…

If you get one of these shipped it's a good idea to reseat everything anyway, even if it is screwed/latched down.

Ya, it is a piss-poor connector for sure. I thought the same thing after install, that a solid bump would free it.

It's that lousy connector. I have a Gateway Solo 9200 (PII@266MHz) which all the boards (Video, I/O, CPU, HD, Power) are sandwiched together by these connectors. It took a nasty fa…

That's definitely strange! I wonder if any other Macs have done something similar, and if so how many...

Yup, about mid-way. I would assume this could happen with an upgrade card when a driver loads. But odd on stock hardware. So not sure. It detected the defect and did not use the RA…

It said something about detecting a hardware defect later in the startup process? I'm intrigued now... how did it say it?

Well after reseating it a few times it now works. Looks like my base RAM is 16MB and the chip is 8MB for 24 total. Well back on the shelf I guess.

Im going to assume there is some defect with the RAM card I installed. But what threw me off is that it boots then halfway through startup it pauses to say something about a memory…

     I'm not sure of the APN although that description sounds right. Mine just says AMP Rev. 2.      And was your comment about your logic boards in response to the photos I poste…

Power board hasn't arrived yet. I also forgot to take before pictures, but this is after the first phase of cleaning. There was corrosion on the board under the PCMIA enclosure …

What do those resistors pertain to? And actually to clarify I didn't mean the capacitors 'blew'. But I think they are bad.

Well without the power board it won't do Anything. At least my 3 would not. Any corrosion below the battery and all I can say is good luck.

I have a 3400c that had some corrosion beneath the PRAM battery.  It wasn't actually that bad, and I've cleaned the board with still unknown results.  Hopefully three capacitors on…

I am having the same exact issues with my apple 3 almost to the T. If you have solved this issue please let me know what you tried. I noticed my power supply is making some weird n…

You never fail to deliver, uniserver. hahaha

this guy looks like he is up to no good!

they could have called one Possessed, just to make it a little more juicy.  I never did trust that Mr Macintosh…  Hummm…….. { "lightbox_close": "Close", "lightbox_nex…

I loved this thread at the first post.