想像一下场景，到达工作地点或坐在办公桌旁准备学习，按一下笔记本电脑上的电源按钮，没有任何反应。 一切都已连接，昨天工作正常，但现在没有生命迹象。 如果您的笔记本电脑在您询问时无法打开，这就是您的指南！
另请参阅我们的文章如何将笔记本电脑用作台式机
有几种原因可能导致笔记本电脑无法开机。
- 电缆故障。
- 跳闸。
- 电池没电了。
- 主板短路或其他故障。
只有最后一个是终端。 即使您确实遭受了主板故障，您的文件仍然是安全的。
Basic checks for if a laptop will not turn on
First let us cover the basics. We want to eliminate the simplest, but most common causes of a non-booting computer. Perform each of these in order and move on to the next if unsuccessful.
Plug in the laptop charger
If you usually run your laptop off battery and charge when needed, plug it in now. Make sure the power light on the charger’s transformer (if it has a light) is illuminated to show power is getting through the charger. Check all connections between socket and laptop are tight and correct.
If your charger doesn’t have a power light, try it in a different socket and retest. If you have another laptop you can test it with, try that. The same for if you have another charger. This will eliminate faulty charger or fuse from the equation.
If you use a power strip, plug the charger directly into the wall. Change the room, socket or whatever to make sure the charger itself is working.
Unplug the battery
Sometimes laptop batteries can get stuck into a non-power state where they do not release stored energy to the laptop. Unplugging and then reinserting the battery can often reset this condition.
- Unplug the charger from the laptop and remove the battery. Some batteries just unclick and slide out. On others you will need to unscrew the bottom cover and manually remove the battery cable.
- Leave the battery unplugged for a couple of minutes and then reassemble.
- Retest first with just the battery.
- If the laptop will not turn on, plug in the charger and retest.
Discharge stored energy
Residual voltage can occasionally interfere with how a battery works so our next task is to discharge that voltage. You can do this alongside the operation above, but it is better to change one thing at a time and retest so you can identify the exact problem for effective repair.
- Unplug the laptop from the charger and remove the battery.
- Hold down the laptop power button for 10 – 15 seconds.
- Reconnect the charger cable without replacing the battery.
- Power up the charger and try to power on the laptop.
If that doesn’t work, you could repeat the process but hold down the power button for 30 – 60 seconds and retry.
If none of those tests above work or you don’t have a spare charger or laptop to test the charger, you have a couple of options. Now we have performed the basic checks, we slip into the realms of spending money. The first option is obviously free and will cost you a coffee at most. The others will start to cost.
- You can ask a friend who has the same or very similar laptop if you can borrow a charger. This will only work if the laptops are from the same manufacturer and usually the same age.
- You can go to a computer store and have them test the battery and charger.
- You can replace the battery yourself to see if it works.
更换笔记本电池
更换笔记本电脑中的电池非常简单。 如果执行了上述步骤，您将已经知道如何取出电池，因此您所要做的就是更换电池。
我总是建议您从笔记本电脑制造商那里购买原始的OEM电池。 它比无名零件贵，但将得到保证和质量检查。 如果愿意，可以选择购买复制电池，但是在质量和可靠性方面差异很大。
如果从eBay或国外购买笔记本电脑电池，请务必小心。 尽管广告可能会说它们已经过质量检查并符合标准，但这不一定是正确的。 尽管它们可能会比OEM电池便宜，但您确实能得到所付的一切。 有些将是完美的并且可以可靠地工作并且没有问题，但是您永远不会真正知道。 有时，最好多花一些钱来省心。
更换CMOS电池
如果您的笔记本电脑较旧，则可能会使用CMOS电池。 这很少会导致笔记本电脑无法开机，但是有可能。 由于电池的价格不到10美元，因此如果电池本身没有故障，就值得尝试。 CMOS是纽扣电池CR2032，如果您的笔记本电脑有一个，则将在主板上。
CMOS也称为RTC（实时时钟），通常会在静音之前为您提供故障提示。 如果系统时钟不断重置或BIOS设置继续恢复为默认设置，则可能是CMOS电池故障的迹象。
并非所有的笔记本电脑都仍在使用它们，但有些仍然在使用。 我知道东芝笔记本电脑仍在使用它们。
- 从笔记本电脑上卸下底盖。
- 寻找连接到主板的银币电池。
- 更换电池并重新测试。
如果您已经测试了电池和充电器，释放了所有残余电压，更换了电池并检查或更换了CMOS电池，但仍然没有寿命迹象，则可能是发生了短路或主板故障。 这通常在家里无法修复，而且通常超出了经济修复的范围。
好消息是，您可以从笔记本电脑中卸下硬盘驱动器，然后将其插入另一台计算机，以便仍然可以访问文件。 坏消息是，您极有可能必须更换笔记本电脑。 对于那个很抱歉。
