Will, I agree. It seems highly unlikely that a PCMCIA card would destroy the power supply, it also seems odd that it would die right after I had successfully installed Mac OS on the card. It could have been a strange coincidence, but I've tried resetting the PMU serveral times and the machine seems dead as a doornail.
Jason, Yesterday I found a service manual and did a complete tear down of the 3400c, since I had heard that sometime the power module comes loose. There are no signs of damage anywhere and the backup battery is still good. I even tried booting with it disconnected. No go. However, in doing my tear down I did see the solder pads for the power jack on the MB and I tested them using my voltimeter. There were three pads. I was getting a reading of 0V between two of the pads, and a reading of about 3V on the other which seems peculiar. Either the power adapter does some sort of negotiation with the PMU prior to delivering full voltage, or it is delivering a severe under-voltage. I may consider getting a new power brick in the off chance mine is bad. -- Marcio | | | Jason Johnson <[email protected]>: Jul 01 05:03PM the 3400 has a pram battery that is mounted over the left side speaker. when it leaks the acid rots the screen, keyboard and motherboard connectors under it. You may want to take it apart and see if you can clean and salvage it. Out of 3 I have had only 1 I could save (not mine, bought off eBay). ________________________________ From: [email protected] <[email protected]> on behalf of William Bowles <[email protected]> Sent: Saturday, July 1, 2017 8:28:35 AM To: [email protected] Subject: Re: PowerBook 3400c Power Supply I would think that the psu is still good and a compact flash card doesn't draw enough power to fry the psu as it is basically just a big ram card with no moving parts what I would do is reset the pmu after removing the compact flash card reinstall the cd rom then restart the book normally and see if you get any joy let me know. | -- -- ----- You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/ --- You received this message because you are subscribed to the Google Groups "Vintage Macs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
