No sound does not work with Windows 7 or Windows XP

Features PC
Motherboard: MSI G41M-P23
Processor:
Graphics: GF9500GT 1024M DDR2 128 bit
Memory: Kingston 2x2GB DDR3 1333
Hard Disk:
Power supply: 420 W 9.25 LPJ


Operating System
Windows 7 Ultimate

Description of the problem
The client complained that although the installed Windows XP and Windows 7 failed to make sound work. Usually if a problem persists in at least two different operating systems makes us think of a technical problem, which is a component malfunction.


Possible Defects
Sound 1.Driverele uninstalled or installed wrong
2.Conexiunea of ​​motherboard and sound from the computer panel made the wrong
3.Circuitul sound on the motherboard defect

Identifying the problem
1.Verificarea in Device Manager if all drivers are installed
Verdict in this case: OK
2.Verificarea panel audio connector that connects the front of the motherboard
(If the case does not sound jacks in front audio connector on the motherboard jumpers necessary shunting 2)
Verdict in this case: OK

Defect
In this case the problem occurred because of faulty audio circuit.

Fix
Remedy was replacing the motherboard.