The problem is the tin/silver solder connections
under the G.P.U.. The heat generated by the
G.P.U has warp the board slightly and literley
pulled the connections right off the P.C. board
The best type of repair to have the G.P.U
reflowed (re soldered) and a replacement of the
heatsink compound and a the installing of a
heaver gage hold down bracket for G.P.U
( hardware up grade)
cost will very 90-150 so shop around for
someone local and check customer reviews.
option 2 is much riskier it involves you
attempting to reflow the chip set yourself
with a heat gun. it is doable but you
need a good Hi temp digital thermometer
and heat shielding for heat sensitive parts.
it's kind of a two man operation , one
watches the clock as the other heats up
the chips.
I don't recommend this unless you have
had a little practice.
If you have any questions feel free to ask
Rob
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