question about a 30001 ps2 problem..

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i have a 30001 ps2
since 2000 i got it..
since monday it stoped playing
backups, originals
only cd rom games..
and it´s strange because
i was playing like at 5pm o clock
then returned for a guilty gear x2 play
and didnt wanted to start
and since doesnt play any dvd
i took it to repair
they opened and say everything was fine..
that my machine is in excelent shape
and that they dont see what´s the problem..
with it..

any suggestion?
to see if i can save my old friend
i have some paternal love for it becaue
it was my first ps2