To prevent this, always load Windows first. With a kernel panic there is often an error message that should be helpful when troubleshooting the problem. A kernel panic serves basically the same function as the blue screen of death in Windows,. The tools listed here are used to assist in troubleshooting the problems you would encounter repairing a PC. Be certain you are familiar with all of their functions.
SFC : Any of the operating system files can become corrupted for no apparent reason. Logs : There are a number of log files created by Windows to track system performance. Most are contained in the Event Viewer, outlining security issues and other system events.
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For Windows 8 and 8. This minimal environment bypassed many of the drivers that may have caused problems initially. Defrag realigns all the file fragments into contiguous files on the drive. This not only speeds up disk access, but also eliminates wear on the drive. Keep in mind that solid-state drives should never be defragmented. Event Viewer : To see what is happening at anytime, use the Event Viewer. The Event Viewer displays information about running applications and security data. Warning messages and critical issues will be labeled there as well.
Safe Mode : There are a number of troubleshooting tools that are available, even before the operating system is loaded. Safe Mode allows the system to be booted with minimal drivers loaded, allowing you to address issues before the operating system loads. With Windows 8 and 8. We are dedicated to bringing you the very best practice tests, flashcards and study guides to help you prepare for and pass the test that stands between you and the rest of your life. ALL Rights Reserved. CompTIA does not endorse the use of our study materials. Over the years, as device features have increased, displays have gotten bigger, mobile CPUs have gotten faster, and apps have become more graphics intensive, battery power has become a premium for mobile devices.
Batteries have not necessarily kept pace with the other rapidly evolving hardware and features on mobile devices, however. While marketing ads proclaim extended battery life as a feature of the latest and greatest models, newer, faster hardware and features in proportion seem to neutralize any benefits of that extended battery life.
Several factors can affect battery life. One of the main factors is network usage.
Any time the device is connected to a network, such as a wireless network or even the cellular one, the device is constantly transmitting and receiving data, sometimes in the form of simple management messages that are sent back and forth to the network entry point device. Even when there is no real data being transmitted or received over the network, these management messages require power from the device, and they can, over time, significantly reduce the battery charge.
Often, when traveling, a device such as a smartphone or tablet will constantly roam or try to pick up the strongest cellular or wireless signal it can find, and this constant search for stronger signals can significantly drain battery power. This unintended power drain can be controlled with most smart devices, however, through configuration changes that limit device roaming or searching for new wireless networks. Another significant cause of battery charge reduction is the constant use of GPS or location services.
When location services are turned on, the device is constantly receiving GPS data in order to fix its location.source link
Troubleshoot-Services CompTIA A+ Study Guide
This could be for apps that require location data in the background, or for active apps, such as mapping software, that use the GPS receiver. In any event, the user will notice significant reduction in battery charge, and over the life of the device this will reduce the life of the battery as well. The simple solution to this is to be judicious with networking location services. When they are not required, they should be turned off. Another tip is to review configuration settings for apps that use location services and disable the ones that don't need to have immediate location data.
In the event that you may actually use an app that requires location data, you can always turn the setting back on and let the app get a location fix. Some examples of apps. Notice how much of the battery is being drained from the screen configuration alone!
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Batteries on mobile devices can experience a phenomenon known as swelling. When this happens, the battery casing actually swells; it heats up, often cracks, and can cause leakage of the material inside. The device should be removed. Second, using a non-OEM charger may cause swelling, if you are using a charger that is not rated for the correct voltage and wattage the computer requires. An overheated computer or battery can also cause swelling.
Finally, in rare cases, you may occasionally get a battery that is simply bad from the manufacturer. When you encounter a swollen battery, there really is no recourse except to replace it with a known good battery, preferably an OEM battery that came from the original device vendor.
A mobile device that overheats is never a good thing. An obvious reason for overheating would be leaving it in contact with direct sunlight for long periods of time.
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That can damage the screen and other components. Our concern here primarily, however, is a device that overheats on its own. This is almost always caused by some sort of hardware issue, possibly a defective battery or other power circuit within the device. There's really not much you can do for this issue, except take it to a service center. The dangers of not addressing an overheating mobile device are, at least, an eventual device failure, resulting in lost data, and, at worst, a device that overheats so much it becomes a safety issue for the user by becoming so hot that it burns to the touch, electrically shocks the user, or causes the battery to leak or explode.
A mobile device that locks up or freezes can be a huge annoyance. There are several possible causes for this issue. First, an app that's not written properly, or is incompatible with the device, may cause the device to freeze because it is using too many resources, or using them incorrectly. An example of this would be an app that uses too much RAM, improperly accesses particular memory addresses, or consumes too much CPU time.
A second cause could be a network connectivity issue. A device will often seem to freeze when it's desperately trying to find or maintain a network connection, and this will consume a lot of resources until it finally gives up. Finally, faulty hardware can cause a device to freeze. This can manifest itself as a frozen touchscreen, hanging apps, and generally poor performance.
The solution to a frozen system is often to reboot it, clearing its RAM and restarting it. If the device frequently freezes, especially when using a particular app, then the solution is probably to reinstall that app or find a replacement for it. Sometimes operating system issues can cause device freezes, so look for OS patches that may correct those types of issues. If the device randomly and with increased frequency freezes up, whenever using any type of app, then it's likely a hardware issue and the device may need to be serviced.
While these vary by type of device, here are a few tried and true issues to look at when your device cannot broadcast to an external monitor:. All monitors, TVs, projectors, whatever have lots of inputs. Is the external monitor pointing at the right source? Make sure you have an adapter that is known to work for your device! Depending on the make and model, it's common to have to reset one or both devices to give the HDMI time to see who it's plugging into and set itself up.
Sound issues are also common in mobile devices. The most obvious, and probably most common, issue is that the volume is turned down through software configuration or an app, or the speakers are muted. This is easy to fix, but sometimes you have to go through many configuration settings for both the device and apps to figure out which one is controlling the volume at the moment or which one may actually be muting the speakers. Many mobile devices have hardware volume controls on them, so check them.
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Aside from some of the issues with devices, hardware, and the operating system itself, there are occasionally issues with location services on mobile devices. Most mobile devices today are made with some type of built-in technology designed to ascertain the device's location. Most apps use location data for a variety of reasons. In some cases, it's used to assist the user with whatever functions the app performs, such as locating a restaurant or a bank, for example, near the user. In other cases, location data may be used to provide services such as weather or local traffic conditions.
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And, for better or for worse, some apps use location data rather covertly for the purposes of marketing and reporting user data back to their respective vendors for various reasons. For the most part, this particular use is usually unknown by and undetected by the user. In any case, there are many different uses for location data, so it's considered an important feature of most modern mobile devices. Symptoms of location issues include a map app not being able to identify the exact location of the device, or error or other messages from the device, OS, or various apps.
Troubleshooting location problems begins with simple actions such as making sure that your GPS, cellular data, and Wi-Fi are turned on and functioning properly, as sometimes these services can be inadvertently turned off by the user or by an app, and have to be periodically reactivated. Typically, a warning message would indicate whether or not GPS or data services are turned off, so this would be an easy problem to identify and fix.
Other issues may only affect specific apps because they may have been configured such that they are not allowed to access or use location services. This is usually a matter of going into the app configuration or location services settings and allowing the app to make use of those services.
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Otherwise,before digging deeper,first consider simple issues such as whether you are in a place where you can get a good GPS signal. There also other problems that may cause location issues that are related to the operating system and the hardware in the device.
You need a minimum score of on a scale to pass. Candidates taking Exam should be able to demonstrate these core skills, among others:. Below is a general overview of each domain. You need knowledge of laptop hardware and features, the different types of mobile devices and how to configure them, and their various features such as email.
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