December 31st, 2009
Visit sometimes Latitude E5400 website we recommend. It will help you to use your Q6273A BT500 hardware to the fullest HP extent.
There, you can download the latest Q6273A BT500 updates of firm ware and Latitude E5400 drivers for your PEX1S552 device. You can also create LQ12DX03 restore points of your system in case of program failure. You would be able to retrieve initial state easily and try installing a Q6273A BT500 driver one more time. If you have an outdated PEX1S552 unit, you won’t be able to find the matching Q6273A BT500 driver thereto.