Hello fellow members,
New member here, Would like to say hello and glad to be part of the community, not new to Apple IIs though. Ive just completed assembling a Rev zero replica board and upon initial boot, I got no boot, no video, but ticking from the PSU. No power light on but did flash when I powered it off. The PSU has been recapped and tested good readings. The power bulb has been tested as well. All LS logic ICs were tested on a mini pro before installation and the Integer Basic ROMs were supposedly tested from a trusting source. There are no "dots" on the board designating #1 pin on the resistor arrays so I installed them like my ii plus boards RA1 with #1 pin farthest away from the keyboard and RA2 and RA3 installed with #1 pin closest to the keyboard. Are these installed the same on the ii plus as the rev0? All resistors, transistors and the 6502 were tested as well before installation. I'm currently in the process of checking all the sockets making sure no solder jumped to another leg of the sockets. All card sockets, all pins have no continuity between them, all clean. I get continuity from the 5V pin where the power comes in to all ICs that have 5V, same for 12V at the 8 RAM. The ground post has continuity to everything that has a ground leg. I've been trying to find out , and I cant seem to get an answer, is do all 3 memory select jumpers need to be installed? I am currently only populating zero bank with 4116s and I have only 1 jumper installed at the D1 location. I have the "Red Book" and have read the section about installing more ram, but it never mentions anything other than how to wire the jumpers to corrospond with whatever RAM you use. I guess what I'm looking for "if you have THIS bank popuated, THIS is where the jumper goes for that particular bank." What did this board look like when someone bought it in 1977 with just enough RAM to get it booting for the customer. Thank you all for reading this and hopefully someone can shine some light and point me in a direction.