Cant Turn My Modded Pstwo(slim) On

[ran65]

Hello, Im new to this form and i hope somone here can help me out...
I got a matrix infinty (1.38v) installed in my brand
new pstwo(slim) last week, it was done by a technician
in a store - so i almost certine he did a god job with
the soldering, I also believe the chip is original, he
also installed a laser protection chip - but i dont
know any details about it. We checked the machine in
the store and it looked fine.
Few days later, when i had the chance to test it at
home i found out that i cant turn the PStwo on, When i
pressed the power button nothing happend (the red
light flashes on and of randomly), Some times
the PStwo will start for a few seconds and then shut down
again (most of the time it wont even start).
This happens regardles of the disk i put inside(it
also happends when i try to turn it on with no disk,
or with the tray open).
I first thought the problem lies in the power cable
(coz of the red light turning on and off randomly) but
when I replaced the cable nothing have changed.
I hope you can help me with my problem befor i have to
go to the place were i had the chip installed (its far
away from where i live). I should mention that the ps
was bought in US and i live in israel, this is why i
use an adaptor on the power cord, altough im sure this
is not the cause of my problem.

oh and, Sorry for the ****ty english.
**** it. im not sorry.