wireless no finciona

Hola,
Hem comprat 14 portàtils clònics a BEEP sense sistema operatiu.
He instal·lat la Linkat 2.0 en un d'ells i em trobo que no reconeix ni el botó de wireless ni detecta la tarja de xarxa (iwconfig?).

A la factura del venedor hi figura el despiece dels components i diu que és:
SIT20-T.WIRELESS AW-GE780 802.11b/g

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linux-vlgg12:~ # iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

sit0 no wireless extensions.

linux-vlgg12:~ #
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linux-vlgg12:~ # lspci
00:00.0 Host bridge: Intel Corporation Mobile Memory Controller Hub (rev 0c)
00:02.0 VGA compatible controller: Intel Corporation Mobile Integrated Graphics Controller (rev 0c)
00:02.1 Display controller: Intel Corporation Mobile Integrated Graphics Controller (rev 0c)
00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI #5 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 2 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 3 (rev 03)
00:1c.3 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 4 (rev 03)
00:1c.4 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 5 (rev 03)
00:1c.5 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 6 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f3)
00:1f.0 ISA bridge: Intel Corporation Mobile LPC Interface Controller (rev 03)
00:1f.1 IDE interface: Intel Corporation Mobile IDE Controller (rev 03)
00:1f.2 IDE interface: Intel Corporation Mobile SATA IDE Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev 03)
04:00.0 Ethernet controller: Broadcom Corporation Unknown device 1713 (rev 02)
0c:00.0 Ethernet controller: Atheros Communications, Inc. Unknown device 001c (rev 01)
0e:06.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 05)
0e:06.1 Generic system peripheral [Class 0805]: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22)
0e:06.2 System peripheral: Ricoh Co Ltd Unknown device 0843 (rev 12)
0e:06.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 12)
linux-vlgg12:~ #
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Em podeu donar alguns consells de per on he de començar, siusplau?
Gràcies per endavant.
Lluís.