First of all my computer went black. I put it in the shop and it was discovered that a capacitor had gone out, it was replaced, I had a dvd player installed also, when I got the computer back all of my info was gone. I tried to listen to the audio player to my dismay I had no sound. I received this message. Unable to play back audio. No sound device detected on your system. I check the sound in the control panel to see if the volume was muted or at the minimum level but there was nothing highlighted.
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Open your computer and make sure that he connected your dvd power cable . He had to replace your power supply that connects to every component to give it power so either its loose or not connected.
If not the dvd could of gone with the power supply.
Test your PSU power supply unit or replace it if your power
supply units fan is not working your PSU is faulty http://pcsupport.about.com/od/toolsofthetrade/f/powersupplytest.htm Testing and replacing the PC power supply http://www.youtube.com/watch?v=hbNxhvm0czs
One bad lead can cause a computer to continue on a cycle of
restarting or to shutdown or fail to detect ,boot up a computer hard drive
WARNING Before you
start troubleshooting remember that you are dealing with electricity that can
Only work inside the computer case when the power has been
switched off and disconnected. Never open the power source.
Some of the below steps
recommend removing physical parts within the computer.
While in the computer it is
highly recommend that you be aware of ESD and its potential hazards
Test all leads that attach to your hard drive power and data
cables IDE ,SATA
the leads from your
MOTHERBOARD TO YOUR HARD DRIVE
make sure they have a secure dust free connections and are not faulty or
just replace them they could be faulty
Make sure all leads that
are attached to your dvd \ cd floppy drives have secure connections and are not
faulty or just replace them they could be faulty.
Computers need power and
data to travel through every working device to continue its cycle and have an
end so any faulty leads will end up with a computer error.
Even something as small as
a faulty electrical or fan lead can cause you problems
Motherboard and a Hard Drive any leads between them will
fail before your motherboard or your hard drive if its a flat ribbon 40 pin
type IDE replace it this will be the first to fail.
Check all electrical power input and extensions make sure
they are securely seated even the cd/dvd floppy drives need to have current go
through make sure these drives are working
also check the Cmos battery and computer RAM modules make
sure they are securely seated with no dust built up or in the sockets on some
motherboards cmos batteries are soldered in.
you CPU central processing unit make sure its securely seated and has thermal
paste it might be getting to hot the thermal paste will help disperse the heat
Thermal compound is a sticky paste that is placed
directly onto the CPU. http://www.hardwaresecrets.com/article/Thermal-Compound-Roundup-February-2012/1490
Allowing for a more direct heat transfer between
the CPU and HEAT SINK and preventing air gaps from forming between the CPU and
Another possible reason could be a memory dump you might be
running to many programs at the one time putting to much strain on the CPU
central processing unit.
If you can get your computer stable enough
scroll to bottom toolbar
bottom of screen right click select task manager
applications you will
see whats running if you see anything you dont need running select end now
also under processes see
what is ticking over again if you see something you do not need to be running
end now or you might uninstall that
program and some unnecessary programs
not having enough computer ram can cause memory dumps
If you are not sure if a module is right for your system use
the Crucial Memory
Advisor tool for a list of guaranteed compatible modules.
first you will need to select the manufacturer from a drop
down list then select your product line from a drop down list then select the
model then click find it will take you directly to compatible ram also you will
have an option to scan your system
you should always for a guarantee on any ram modules when
purchasing them or buy working pairs if possible.
You might have a virus or malware.
Download at least one of these of course it will depend on
your operating system.
microsoft security essentials your operating system must be
64 bit http://majorgeeks.com/downloadget.php?id=4281&file=1&evp=dbb3b0aebe6a6a4ff18089a6489a5e62
anti malware free edition Win XP/2003/Vista/Windows7 http://windows.microsoft.com/en-US/windows/products/security-essentials/product-information
malware protection http://100-downloads.com/download.php?p=615
windows xp microsoft security essentials http://100-downloads.com/download.php?p=614
windows 7 microsoft security essentials
Capacitors look like small metallic canisters and they are
found in many different computer components including computer monitors,
computer motherboards, video cards, power supplies and a variety of other
A bad capacitor can cause a variety of computer problems,
but if you can identify the faulty capacitor you may be able to replace it and
save your computer. Capacitor Capacitors, sometimes also called condensers, are used to
store energy in an electric field.
In the context of computing, capacitors are used to block
the direct current being circulated around the motherboard.
A typical capacitor should last up to 15 years, but some
computer manufacturers use substandard capacitors resulting in shorter
lifetimes. Computer Problems
When a capacitor has gone bad on a computer you may
experience a large range of problems. The computer may have trouble booting up,
or it may shut down without notice after running for only a short period of
The most common problems associated with faulty capacitors
are that they cause unexpected computer crashes and general reliability issues
ranging from read/write issues to distorted screen images. Identifying a Bad Capacitor
To identify a bad capacitor you will need to open your
computer case and locate the capacitors on your motherboard.
A bad capacitor may exhibit swelling at the top or the base
of the capacitor or it may sit at an awkward angle with the motherboard, so
compare the various capacitors in your computer in terms of size and placement.
Additionally, a bad capacitor may have a funny smell or it
may have a brownish residue leaking from the top or the base. Prevention
Manufacturers claim that capacitors may go bad because a
computer is not receiving enough power from a power supply, because of an
overclocked processor or because a computer is operating in an environment with
too much heat or humidity.
However, some capacitors prematurely fail due to faulty work
on the part of the manufacturer.
If you have a bad capacitor be sure to do research as to the
lifespan of other products made by your manufacturer.
Identifying bad capacitors http://www.youtube.com/watch?v=ngA4k32jLGc
Capacitor replacement http://www.youtube.com/watch?v=s0Pn2tEjY04
How to check a capacitor http://www.youtube.com/watch?v=U4tnHA0phcc
Replacing a leaking capacitor http://www.youtube.com/watch?v=s0Pn2tEjY04
Could be a problem with the Hard Drive or the Hard drives
PCB http://www.onepcbsolution.com/ http://www.youtube.com/watch?v=du0Qd_3wFWM
Need more information... is it a new computer???, did it read DVD's befor than STOP???, what kind of DVD... DATA or FILM??? what is the Operating System Windows or LINUX??? how old is the DVD unit??? (hours of use)
Try installing the correct CODEC's and software...
2 green lights usually indicate a memory problem, however, when you get 3 lights, RAM is good, but the BIOS is unable to hand off to the operating system.
To test this, disconnect your hard drive (both ribbon and power) and connect the monitor. See if you get a display. If you get a display, try carefully reseating the cables to the hard drive and also to the motherboard.
If you lose the display again, disconnect the hard drive and connect your DVD/CD and put in a Windows or diagnostic CD to see if it will boot.
If it does, you have a bad hard drive.
Let me know if this helps or you have other questions.
Use control panel - add/remove program and uninstall any programs for the DVD player. Next use control panel - system - hardware - devices and uninstall the DVD player. Leave the device connected. Reboot and when system detects the player load only the driver for Ur os. See if this fixes the problem. If still not work, sounds like time to replace. DVD writers do not have but a coupla' hundred writes and the laser burns out. Designed that way.