I just installed the DMS3 v1 chip in my JAP100000 model PS2 and I got the PS2 before I got the power transformer, because I live in the UK.
As I was so eager to play with it, I soldered everything and prepared the PS2 to be ready and chipped so when the transformer came, I could plug it in, and play!
The soldering was all perfect and when I go to test it out, the ps2 gives me a blank screen with fuzzy lines over the screen, so I think it might be ok.
The eject button does not work and the blue LED above it isnt on either.
I desoldered everything and now the same thing happens. No bridged cd/dvd pins or bad soldered areas.
Unfortunately I cant tell if it would have worked without the chip in first, because I was impacient