Sony VAIO VGN-AR230G Notebook "letter judges" Questions

I have the HP Pavilion DV5 1120us FR975UA notebook. The keyboard (502622-001) is silver keys. I can't read the letters on the keys. I'm aware there is also a bronze color version, but it's

Simply, The bios update failed I did everything to the letter I restarted the system (HP Pavilion DV9521tx) made sure all antivirus and tea timers programs were disabled through msconfig in Admin mode

what is the average price for the Sony Vaio VGN-AR230g?? what is the difference between that sony vaio and the Sony Vaio VGN-AW190? which would be more recommendable? Briefly:- The Sony AW models only