客户送修一台联想笔记本,故障开机不显示。接电流表,开机后电流0.44,判断主板供电问题。
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2023/07/42d1764956034f75955330f77103fb42noop.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2023/07/42d1764956034f75955330f77103fb42noop.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
拆开笔记本,测主板各路供电发现 +3VALW TO +3VS 电路工作不正常。万能表测得输入电压有3.3V
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2023/07/bb5104963a5d44aca6cf047df89dd605noop.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2023/07/bb5104963a5d44aca6cf047df89dd605noop.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
输出电压只有1.79V,正常应该是3.3V。
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2023/07/6eb0baab2fcb48beb27fc8b3ce9f9dcbnoop.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2023/07/6eb0baab2fcb48beb27fc8b3ce9f9dcbnoop.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
打开电路图找到相关电路结合现场测量分析后,,更换Q111后故障排除
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2023/07/0823b3fa8c024c77b3b8ed07def5c413noop.png)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2023/07/0823b3fa8c024c77b3b8ed07def5c413noop.png)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
接屏幕已经正常点亮,这是I5二代的处理器,4G内存,500G机械,应该是2013年左右的机器,坚挺了五六年了,现在办办公看看电影还可以。
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2023/07/1fbe1186945a48a78ad1d1d27fafa78dnoop.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2023/07/1fbe1186945a48a78ad1d1d27fafa78dnoop.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
顺便给他清理一下风扇,这台笔记本估计从没清过灰,出风口已经完全堵死了,像这种会导致电脑内部温度高,照成各种问题。 下面是清理完的照片。笔记本清灰很重要。
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
进系统后使用巨卡,看一下右下角就明白了,一个腾讯安全管家,一个金山毒霸,还有一个360安全卫士,难怪快不起来,建议大家杀毒软件装一个就够了。
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2023/07/9d13486257014f1686ae2e8e0c4e1c4anoop.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2023/07/9d13486257014f1686ae2e8e0c4e1c4anoop.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
![换个小零件修好一台笔记本](https://www.oaimai.com/wp-content/uploads/2022/01/di1.jpg)
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