I have a modbo v1.1 (i didnt know it was a clone when i got it) and a didode fix and the matrix pic fix.
To turn on my ps2 i have to first take out the power cord from the back then put it back in, wait like 2 seconds then press the power button.
If i do not do this the ps2 wont start, the button just stays red.
Some times if i press it a couple of times (the power button) it will turn on, but it seems like i have to do it in a patter (crazy eh?).