HELP!! NO AIRPORT, SOUND, USB, RAM SLOT NOT WORKING

A couple of days ago i opened up up my 06 macbook pro. i opened it up to clean the airvents bc the laptop was getting crazy hot.so I cleaned out all of the dust and when i put everything back together, it wouldnt boot. i got a black screen and the hd light was on (not blinking, solid). so i took out one of the memory sticks and it booted. but now that it booted it says i have "no built in output" "no airport card installed" and one of my usb ports isnt working and i was thinking maybe something wasnt connected to the LB but i went backed and triple checked adn all of the connections seem fine but idk. could it be possible that the logic board might have shorted out while i left it on the chair when i took it apart?? or it just might be a connection that i might have forgotten?? please help me as i dont have money to buy a new laptop. on the bright side the MBP doesnt get hot anymore.

thanks to anyone who helps me 🙂

also watching videos on safari was a problem, and i switched to chrome and it fixed it right up, but all of these problems happened at the same time. (not sure if relevant)

p.s i already tried a smc and pram reset