check the power source of all relevant devices
Check your battery first, its terminal connection and connection leading to the starter.
The sound card is the first item what you need to check. If have no problem with the card, you need to check the software. And maybe you need check the connection,
Contact your DSL provider if they are having maintenance works that affects your internet connection. If there are none, I suggest you contact them for visit on your place to analyze what is the problem. I suggest you should check first your pc if the problem came from your computer connections.
You'll need a ODBII code reader to reset the check engine. The connection is under the stearing colonm. First check the code, clear the problem and the reset the light.
First you have to determine what the problem is. The fan, fuse, switch, loose connection. Check the fuse first and then run power to the fan to see if it works.
The very most common problem with all General Motors vehicles is the side post batteries. Corrosion builds up and you do not get a good connection. Remove the negative cable First and Install it last. Clean the battery terminal and the cable ends with a wire brush or a battery cleaning agent. Check the water in the battery. If this does not take care of the problem then you need to have a professional check it out for you.
define the problem
check the fuse first then for broken connection
It depends on what is happening that makes you suspect your connection is bad. You might first get a technician on the phone to walk you through a check of the connections. Next, make an appointment for a service tech to come out and check the connections as well as the feed. Once you rule out any defects in the equipment or the service, you can move on to figure out what the problem is.
If you are having a problem connecting to the internet, there are several ways to tell if the problem is with your computer or your ISP (internet service provider). First, check your network connections from the control panel on your computer. If your computer says that you are disconnected, the problem is probably with the connection between your computer and your router. If not, the problem may be with your computer itself, your router, or ISP. Check your router's status indicator lights. If they are not blinking normally the problem is most likely with your ISP or the router itself. If not, it is probably a problem with your computer. Answer Check out in this order: System, Program, User...
First click on the general icon it should have gears on it the en go to wireless connection
First, check the fuse to make sure that it has not been blown. If the fuse is okay, i would check to make sure that there is power at the fuse. If there is its time to take the radio out and check the connection behind the radio. If the connection is snug in the radio I would check the voltage on both power inputs to make sure that they are each getting 12v of power. If they are then your radio may be toast. If not you need to look at the wires a little closer to find the problem. It may be a bad wire or bad connection somewhere along the lines.