Advice 1: How to check serviceability of a network card

The computer is connected to the network but when you try to open the page, the browser displays a message about the impossibility of connection. This may be caused by a variety of reasons, one of them is nota faulty network card.
How to check serviceability of a network card
Instruction
1
Look in the system tray – if there's a connection icon of two computers? If not, then it is possible that the network card on your computer just disabled. To enable, open "start" - "control Panel" - "Network connections". In the opened window find "local area Connection". In the column "Status" will indicate its status. If the device is disconnected, click it, right-click and select the context menu item "Insert".
2
The situation is complicated if the list of network connections is empty. In this case, you need to check for a faulty network card. Open in control Panel "System" - "Hardware" - "device Manager". Look under "Network adapters". Most likely, you will see a device marked with a yellow question mark or exclamation mark. This means that the device driver is not installed or it is not working properly.
3
To network card started to work, you need to find her a driver. But you first need to know its exact name. If you know him, search the driver via Google search or any other search engine. If not, you will need the program Aida64 (Everest). Start it on the right side select "Computer" - "summary information" - "Network" and view the name of the network adapter.
4
Finding the network right driver, click "start" - "control Panel" - "System" - "Hardware" - "device Manager" - "Network adapters" and double-click the mouse marked with a yellow icon network card. In the opened window select "Driver" - "Update". As a source, specify the saved driver on your computer.
5
It is possible that the computer doesn't see network card. The reasons can be three: improper installation of the card, incorrect BIOS setting and notthe condition of most cards. In the first case, disabling the computer from the network, check the insert card in the slot. In the second, enter the BIOS and check whether network card. The third option is the most difficult, at home to check for a faulty network card can only be installing it on another computer.

Advice 2: How to check network card

After a successful installation of the network adapter, it may happen that it suddenly stops working, the connection to the Internet is not carried out, the local network no. Initially, you might think that business in the modem or provider temporary shutdown of the Internet today are not uncommon. To test the functionality of the network card, use the tips described in this article.
How to check network card
You will need
  • Check the system settings of the network adapter.
Instruction
1
The easiest way to test the connection and the network card is to pull it out of your system unit and insert it in another system unit, where the LAN connection was OK. We should not forget that you will need to install the latest video drivers for the correct operation of the device. When you install the card in another system unit, make sure that jumpers that are not available in all models of the network adapters that are in the desired position (select Plug&Play).
2
If the reason in incorrectly established drivers, or system failures, device Manager will show the fault in the form of a question mark on network controller. To launch "device Manager" click the right mouse button on the icon "My computer", select "Properties". In the opened window go to tab "Hardware" click "device Manager". You will see a window with a list of all devices. The existence of any problem with one of the devices displayed a yellow sign question mark, as described above. Please note that it is desirable not to occupy port IRQ 15 for the network controller – is not all this port to taste.
3
To check the network card on the performance connect it to another slot (on the motherboard several). Most likely, after these manipulations, the network card starts to work properly. If not, it makes sense to test all network cables.

Advice 3: How to test a faulty graphics card

Don't ever buy a graphics card in a store or salon computer electronics is a guarantee of quality. Any video card purchased even at the factory, may cause constant crashes. So bought the video card should be tested before you give your hard earned money. Of course, not every computer shop agree to test the video card, but if you have the opportunity, do not miss it.
How to test a faulty graphics card
You will need
  • software Ati Tool.
Instruction
1
Program to test you can bring with you on a USB flash drive or CD-ROM. From other programs that are similar in performing certain functions, it features a small size distribution and high functionality. Despite the fact that the title of the program features Ati, she is also suitable for other brands of graphics cards. The exception may be some cards integrated graphics cards, which came later exit the program. Before installing this program and running it install the latest drivers for your graphics card.
2
After starting the program, you will see a window where you can change the values of the sliders. To begin, click Show 3D View, a new window will open the video "hairy Cuba". This program is popularly called the "hairy cube". In the lower left corner you will see the values of the FPS (current & average values). Leave the program for 10-15 minutes to monitor the temperature changes. Accordingly, it will grow. For kernel card the ideal temperature is 60-65 degrees. Some models feel good and at 80 degrees, but this temperature is considered critical. Rapid temperature increases to such indicators evidence of the abnormality of the cooling system. If the Board is old, get rid of the overheating problems you can replace the thermal paste.
3
If with cooling all is normal, pay attention to the image of the "hairy cube". The appearance of yellow patches indicates the failures, the stability of the card in question. If the number of spots exceeds 10 pieces for one piece, even after changing thermal paste, it's worth checking your power supply. If the power supply was recently purchased, it makes sense to go to the store with a replacement graphics card under warranty. A small number of dots and low temperature cores should not cause you anxiety, the graphics card is working at the proper level.
4
Now click Scan for Artifacts. Run another check, in which you can find out the errors. The screen displays a static image of the "hairy cube". In the lower left corner, if no errors, you will see No errors for ** sec. Instead of stars you will see the number of seconds since last error. The higher the value, the better. If within 10-15 minutes no errors have occurred, and the temperature is normal, the graphics card is in excellent condition.

Advice 4: How to check serviceability of the generator

The automotive alternator is designed to maintain battery charge and to power the electrical components in the car: tail lights, onboard computer, air conditioning and others. The generator provides the many components of a modern car, in regard to it apply extraordinary security measures and carefully check.
How to check serviceability of the generator
Instruction
1
Prior to the inspections, remember that it is strictly forbidden to disconnect the generator from the battery when the engine is running. This will cause a power surge could damage the rectifier unit of the generator.
2
Check the generator on the stand. This will allow you to figure out whether its parameters nominal characteristics. Be careful to check the generator brushes were well lapped to the slip rings. They, in turn, must be clean.
3
Turn on the motor from the stand, set using the variable resistor the output voltage at 14 Volts. Bring the frequency of the rotor to 5000 rpm. After 2 minutes check measure the current. If the generator is working properly, then this figure will be at least 44 A. If the current is less, then check coil and valve, to determine the location of the fault. To do this, measure the amperage on a warmed-up generator. Let it work about 15 minutes and then measure the current that must be at least 42 A.
4
Test generator with the oscilloscope. Install the rotor rotates with a frequency of 1500-2000 rpm. The field windings connect to the battery and from the output of "30" will disconnect the power. Now, notice on the screen and on the waveform, check for a faulty generator. If everything is in order, then the curve has a sawtooth shape with uniform teeth. If there is an open in the stator winding or taps, the teeth are not uniform, and there are deep hollows.
5
Measure the resistance between the plug 67 and a ground to the generator. This will allow you to determine the condition of the field winding. In good condition the resistance should be in the range of from 4.2 to 4.7 Ohms. The measurement is temperature dependent, so measurements are required at 20 °C.
How to check <b>health</b> <strong>generator</strong>
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