Switching the boards appears to have done the trick!

On Thursday, June 14, 2018 at 6:43:28 PM UTC-4, James MacPhail wrote:

Hi Kevin,

Two beeps indicates "no memory", which is to say that the self test
didn't find some reliable memory to use for the stack and/or display.

If you have no memory boards, you need one (or two).

If you have one memory board, try moving it to the other slot.

If you have two memory boards, swap them, and if the problem
persists, try each one separately in each slot.

The fact that you hear two beeps indicates some things are working,
eg. you don't get any beeps if the CPU isn't running, or the ROMs are
bad/wrong, or the I/O board is missing, or the PSU is dead, etc.

The fact that you see something on the screen indicates the video
board, CRT and flyback transformer are more or less working
(probably). As Jason wrote, adjusting the brightness control (on the
back of the power supply) may reveal something that wasn't evident
before.

If the zig-zag pattern is a sort of checkerboard, then the memory is
more or less working, if it is a single line at various angles, then
the memory isn't responding to video access requests or the data
isn't getting through to the video shift register etc.

When I have this problem with a Lisa that should work, it is almost
always due to a poor/dirty edge contact.

Lisa problems due to capacitors tend to be power supply related.

Good luck!

James

>I recently acquired a Lisa 2/10. When I try and boot it up, I get
>two beeps. Then this sort of zig-zag pattern shows up. Is this a
>problem with capacitors?