NEED HELP with vgn sz281p sound and bluetooth

My laptop was kind of running hot and noisy lately so I bought a sony vaio vgn sz disassembly pdf file on ebay and open up my laptop to clean it up. Afer cleaning up all the dust and replacing the thermal "thinggy" by the artic silver, I put them back together and boot up my computer. Everything works fine except that it no longer recognize the built in sound card. an error pop up " code 10 device can not start", I thought that it's just a driver problem so I uninstall the driver, and get the latest version from sony website but it still does not work, I even use recover the whole laptop to the manufacturing state but it still does not work. My bluetooth also does not work, the blue light is on but smartwii or Toshiba soaftware could not detect the device at all. So I look into the disassembly manual again and I think that maybe a I damage the power switch. So I order a new unit from ebay to replace it but it still does not work. By the way my laptop is VGN SZ 281p and it has already been out of warranty so I could not send back to Sony to fix it, beside Sony Australia will charge a fortune just to fix those problems. Could anyway provide any advice what should I do or what could be the problem please? I could provide the manual or take apart my laptop again for taking pictures