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if your computer came with a motherboard disc the sound drivers could be on it click start control panel administrive tools computer management device manager scroll to sound video and game controllers you might see a yellow question exclamation mark? ! or a red X Right click to reinstall drivers if you don't have a disk with the sound drivers you have to download them
The Compaq C300 laptop most likely is overheating and shutting down (ie thermal overload) and will not bootup again until it has cooled down. If this is not fixed eventually the CPU will fail.
The overheating is caused by a faulty fan and/or dust clogging the heatsink and fan assembly.
Check the fan to see if it spins freely (replace the fan if it is faulty) and use a stiff brusk to loosen the dust from the fan and heatsink and vacuum the dust from the fan and heatsink.
If you remove the fan assembly from the CPU then apply fresh thermal paste to the heatsink pad before placing it over the CPU.
The laptop should be placed on a flat surface so the vents are not obstructed. You can also place the laptop on a fan assisted base to provide additional cooling.
What you will need to do is open up the computer case and physically remove the soundcard. On the souncard should be a make and model on the circuit board. If you can't see it on the top of the board, it may be on one of the larger integrated circuits (ICs). Most likely it will either be an ESS or Crystal sound card. From there, you can use a service like driverguide.com to find the drivers.
Be sure to firmly seat the card back in when you re-install it. You do not want it half in and half out of the slot, that could damage the computer or soundcard.
there is an icon on the status bar on the bottom right of the computer for the sound volume can you just make sure the volume hasn't been turned off. it a small speaker. If its ok you can try the following. Just one question.
Do you have any of the disks that came with the PC or did you but it second hand. If you have the disk you have to first uninstall the sound driver if they are not working properly before you can reinstall it.
Can you first check whats the story with the drivers in hardware manager. I'll tell you how to get to it. BE very careful in here you could cause major problems if you go changing settings in here so try and follow along and dont change anything just tell me what is happen in the settings.
Go to Start > you will see my computer icon. Right Click and go to properties. there are seven tabs at the top click hardwre > device manager > you need to scrool down to Sound, Video and game controller. Click to highlight it or double click to open it or click the small + sign to the left once highlighted it opens the menu. Can you come back and tell me what it looks like. don't go at anything else in here.
Could you make sure you speaker wire is plugged in properly. Im just going through the obvious. but it can get removed if you move the computer.
I had the same problem, it was due to the charger i had for the laptop, this problem can be accomplished by purchasing STEREO leads. I do not know the reason they work, but if anyone does find out please tell me