Do your heat spreaders have four screws or three ? The final heat spreader for XO-1.5 production had four screws holding it down, to ensure a good fit. If your heat spreaders only have three, OLPCA should be able to get proper replacements from Quanta.
Regards, wad On Jul 22, 2011, at 10:35 AM, Sridhar Dhanapalan wrote: > We are currently engaged in changing the motherboards in over a > hundred XO-1.5s. In many cases, the XOs are failing the heat spreader > test afterwards. > > However, we can get the test to pass if we press down on the lid, > behind the screen. This suggests to me that the heat spreader is not > in proper contact with the chips. > > Without the lid plastic affixed (heat spreader exposed), we can see > that the spreader is not touching the chips properly. We have tried > bending the metal slightly near the screw points, but the contact > doesn't last. > > Is there any way that we can deal with this better? We are changing > the motherboards in these XOs because they have succumbed to > overheating. I want to avoid that from happening again. > > Thanks, > Sridhar > > > Sridhar Dhanapalan > Engineering Manager > One Laptop per Child Australia > M: +61 425 239 701 > E: srid...@laptop.org.au > A: G.P.O. Box 731 > Sydney, NSW 2001 > W: www.laptop.org.au > _______________________________________________ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel > _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel