Well maybe this will get a reply...
Just unpacked/repacked the 550c from the fully prepped outer shipping box for the 2nd time this week, in order to test the AC power adapter and to recheck if the power adapter would start it up with neither battery in their bays as you suggested, which proved to be a moot point. I was pleased to be reminded that my newer multimeter has very pointed tips that can actually contact the adapter plug's sleeves in their little holes, and LO & BEHOLD, the readings come back at a vacillating 0.01<->0.02 volts. As you face the plug with the alignment slots down "at 6 o'clock", and if you number the contacts 1,2,3,4 going clockwise from upper left, upper right, lower right, lower left (the unused one), 1+2 show nothing, 1+3 show the faint reading, as do 2+3. It should be in the vicinity of 16v, so it seems dead to me! What a surprise. Should have gambled $20 on eBay (most are untested) for another M1893 adapter, - the same used for 520's and 540's. Even with the great MUG here in our little town, tracking one down to borrow would be a real adventure. So there are no guarantees, since, as we all know, even the act of shipping vintage electronics can cause more new headaches, it is entirely possible that a working AC adapter may start this up properly as it was when I first received it last Fall. Hmmm. As stated in a previous entry, I will not go back on my word and change my mind about having listed this last weekend, - although it would be great to converse with interested parties. This is a very nice community you've got here and I'm sure someone other than I would be the right long-term caretaker. Frankly, I could use the dough. And as the line goes: "Eight is Enough". Guess I'll have to edit my signature... :
