Windows 7: speakers and usb jacks and headphone and mic jack not working

hello guys i know i am new here and this is my first post but i just really need help with this problem. so i took off the back of my sony vaio e series because the fan was overheating alot so i wanted to clean it out, so i did. when i put the laptop back together the sound was gone as well as the headphone and mic and usbs jacks. i can connect a usb on the other side through the esata jack and i can hook up and hdmi cable and it plays sound on the tv. i tried uninstalling the driver and reinstalling it and im trying to figure out what the problem is. but the thing is when i install the drivers i still dont have anything for the mic come up or the speakers just digital audio(hdmi) drive. i need ur help cuz im in college and i need this computer to work i only had it for 2 years and this is the first problem ive had. thanks in advance

bump...

ok so i got my laptop diagnosed as to what the problem might me and its my motherboard. im trying to find one online but im not finding much. my laptop is a sony vaio e series model number vpc-eb290x. thanks in advance

Hi, I'm confident that this is the solution to your Vaio problem of Speaker, Mic, Headphones, or USB ports not working.
The PCG series Vaio has a small PCB fitted with USB, mic, and line output sockets. This is connected by a ribbon foil to the MoBo. The ribbon foil maybe faulty [unfortunate] or it needs to be carefully removed and reseated to the connector sockets at either end. Be careful when lifting the MoBo [2" maximum] as the touchpad foil is short and may become disconnected

Its a fiddly job!!

Regards

Graham