- 积分
- 24
- 下载分
- 分
- 威望
- 点
- 原创币
- 点
- 下载
- 次
- 上传
- 次
- 注册时间
- 2008-4-12
- 精华
|
马上注册,获取阅读精华内容及下载权限
您需要 登录 才可以下载或查看,没有帐号?注册
x
本帖最后由 mafioso3 于 2010-6-23 23:23 编辑
I have now fixed more than 100 laptops successfully so far. The models are: HP DV2000, Dv6000, and COMPAQ V 3000. besides the reflow, you MUST remove the thermal pad that is in between the GPU and heatsink and replace it with a 2mm thick copper piece approx measuring 7x8mm. These laptops all fail because of the thermal pad not being able to efficiently transfer heat to the heatsink. So just reflowing the GPU isn't enough. Also use arctic silver thermal paste on the GPU, then place the copper piece on it, again put a little more paste and finally fit the heatsink on this. This way you will have a 100% successful repair that will last for a long time. Use this utility to check GPu temp: GPU-Z. get it here
if your GPU is runnning normally at around 60 degrees or less, that's ok. And when running games it shouldn't be more than 75-80 degrees. If your GPU crosses these temperatures, you can be sure the cooling is faulty and needs modification. Check the temp even on working laptops in the DV2000, 6000 and 9000 series and compaq V 3000 series.
I had one laptop whose GPU temp would shoot upto 90 degrees in a few minutes. After the cooling mod it starts at around 49-50 degrees compared to 85.
While reflowing the GPU, i use the default Jovy Lead free reflow profile for the NVIDIA GPU. Do make sure you bend the temperature probe tip as recommended by JOVY to get correct temp readings while reflowing. The upper heater is to be kept at the lowest height for this reflow and reflow of most large BGA ICs. In case your machine isn't following the profile, either heater height is wrong or temp probe isn't making proper contact. Once the reflow is done cool the board and do the cooling modification with copper pieces and put back the laptop. And your laptop should work. If not you may need to reflow again as i had to in one case. The reason for this was i hadn't used flux the first time. I generally run the machine for a few minutes on preheat and place the board onto it and start the profile from a temp of around 45-50 degrees.
I use AMTECH flux.
I have given you the info you need to be successful in repairing all the laptops with this kind of problem. |
评分
-
查看全部评分
|