Continued-Dead GH-023 by M2 1.31
Followed my earlier post mentioned about my PS2 chipped with M2 PRO 1.31 being killed, which are all GH-023 SCPH-50002. I've sent 4 machines back to Sony for repair, the answer is all need motherboard replacement. I've installed 9 machine, 4 gone to sony, another 2 already back, and I believe the rest will come back sooner or later. The M2 definitely kill my machines! It can't be an installation fault, because all machines ended up with same problem, which lots of other post pointed as well, not reading any discs. It sounds like read, but can't get focused or can't read any data off the disc.
I'm now used about 15pcs MarsII 501 on my 50002 GH-023, include silvers and normal black units, all working perfect without anyone back. So another thing cleared that it's not Sony's fault, they did't purposely make random faulty machines.
Can someone work out for those motherboard which killed by M2 1.31, which component is actually killed? I am expecting the resting 3 machine come back to me and I do want to be able to repair them myself.