Apple II

On cold start the RamFAST is not recognized. The computer boots using the CFFA 3000 CF card neither CVTech.ROM nor the Apple 80SC does not show up. However, if I issue a restart from GS/OS, the computer reboots and both show up.

Is this a card issue (failing part)?
Timing issue (that I can adjust someplace)?
A power supply issue (not able to provide enough current at startup)?

After a week of cleaning keys, reseating chips and all that, I finally have a fully working Rev 02! Except one thing -- when I first power the computer on, the video is vertically in the wrong position.. like the whole thing is moved down two lines or so, so the Apple ][ logo is lower than it should be, and you can't see anything when you get to the bottom lines as you type. If I tap my composite connector at the back, after a few taps, sometimes it reverts to the correct position. But it doesn't always hold.. you can see it starting to wig out a bit, and then finally move down.

Trying to decide, in light of my new Rev 02 ownership, what to do with my Rev 04. Looking for some highly subjective opinions.

So I've got a IIc here, starts up with random characters on screen and the built in self test throws out RAM ZP 01000000. I went ahead and replaced RAM #MRD6 and now it shows RAM 00100000. I found this strange and piggybacked MRD5, resulted in RAM ZP 10000000 (MRD7), piggybacked that one too and it just goes up the ladder into the auxiliary bank with *RAM 0.... .

Any suggestions? Should I suspect the MMU?