Is this a burned chip???? also....

[dannydoo]

Its like this

Next to the radion ati chip theres a smaller chip that sayd inferon 6mb or so
It has white crust all along the side of it,and along the edge is greasy looking.

My video has been acting crazy,it bounces around at the slightes touch of the keyboard then the whole thing locks up.
But it dont do it when its cold,takes about 15min.
Also if i push the corners down,it stops it from happening.

I totally stripped the board and see nothing wrong.besides that crusty video chips little cousin part.

help........

[mmmkay]

white stuff is USUALLY the thermal compound..

The intermittent problem you described sounds like a damaged connection between the GPU and the board, which is not usually repairable, because the solder connections are little balls, not the pin type.

Easiest fix is to replace the main board since the graphics stuff is all integrated on it.

[kulcousy]

white stuff is USUALLY the thermal compound..

The intermittent problem you described sounds like a damaged connection between the GPU and the board, which is not usually repairable, because the solder connections are little balls, not the pin type.

Easiest fix is to replace the main board since the graphics stuff is all integrated on it.

There is discussion of repairing a loose video chip by heating the chip from above to the point of softening and reseating the solder. It must be on this list somewhere. Heaters used include hot air soldering guns and something else that shocked technicians but the results were largely favorable.
Good luck. I've got an a31 that freezes periodically that I'm going to try this on.

[phool@round]

[......and something else that shocked technicians]

That was a hot air paint stripping gun. Be careful about applying too much heat too fast or it will crack the chip and also to allow it to cool slowly. If it's an ATI 7500/9000 don't forget the memory is located on the chip. Quick thermal expansion/contraction isn't good for glass. Use alot of tin foil to mask off everything around the chip, keeps the heat off.

There's more talk of it in iBook forums then here.

Good luck.

[dannydoo]

Anyone try this heatgun method?

As far as I can see,the video chip is solid into the board.

kulkousy,have u tried this yet?

[kulcousy]

Nope, Dan.

[proaudioguy]

Anyone try this heatgun method?

As far as I can see,the video chip is solid into the board.

kulkousy,have u tried this yet?

Worked for me.