Can you describe me better where is the alternate point of the clk.
When you had this problem, did your PS2 boot normaly after a first boot? I.e., after booting once, if you pressed 20 times in the reset button, all the 20 times the PS2 booted normaly? This is what hapens with me!!!
I already checked all my solder points an all are OK, and i don't use flux for soldering to avoid all thoes problems you say.