2 minutes to heat up the board, 2 minutes at about 385F, 2 minutes at about 420F, cool down. If you look at some reflow profiles on the web, you will see that (generally) commercial reflow ovens will execute a profile in about 6 minutes. I obtained some liquid flux and squirted it under the Nvidia chip. So, I pulled my system board, I wrapped all connectors and other chips in one layer of aluminum foil, insulated the edge connectors and cpu socket and memory connectors, and left about an inch all around the Nvidia chip. it is how they put the BGA devices on in the first place. Folks, there are lots of documents out there that describe the process. The "heat the laptop up in a towel" and heat gun looked to iffy. I started searching on the internet and found thousands (literally) are having the same problem. About two weeks ago, screen went blank and VGA out did not work. The laptop smells like fries a bit but I guess that'll go ! lol !
I got it all back together now and everything seem to be ok so far but the 3 leds on the board showing the power, battery and HD. I put it in the oven for 5 minutes at 450, shut the oven off and went play CODMW2 for 45 minutes. So I took everything appart, removed EVERYTHING from the board, put it in the oven at 380 for 10 minutes. I already recovered lots of data by freezing HD's in my freezer, why not fix a MB in the oven ! I found this Reflow trick this morning and though id give it a try. Warranty is over of course and HP is charging me 299$ for fixing it or 583 for to send me a new board. He picked it up at the local shop and dropped it to my place.Īfter a few check ups I figured out there was a recall on that specific model. I did a quick fix on a a computer of his not too long ago and was impressed by the disgnostic so he asked me if I could fix his laptop. The screen would not turn on what so ever. A customer of mine left his laptop DV9420ca to the local shop before I met him. Im in the computer business for repairs and tech support. But, I guess ribbon cables are easy enough to pick up. I think however on reassembling I may have kinked/damged one of the ribbon cables as the power button wont work (have to power up the laptop via one of the quick launch buttons and there only seems to be sound in the right speaker. So, I figured I really had nothing to lose, stripped her down again, got out the heat gun and followed a technique as posted in a youtube vid!Īnd, the result, well.here I am typing on my HP!! and, whats more, it seems the wireless has also begun to work again, after a year or more!!! Just hopes it hold out for a little longer this time. This, is another problem also attributed to the graphics card issue. Ok, an update, since I last posted my lappy decided it would die again!!, but, instead of giving the usual one long beep/two short beeps as before, when I hit the power button it would come on (black screen) stay on for 30 secs or so and go off, come on again, 30secs, off.etc.
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