I found instructions for taking apart an Asus L3800 or Asus L3C laptops. Apparently both models are the same or at lease very similar.
This guide has instructions for taking apart the whole laptop. You’ll need this one for accessing the wireless card, CPU cooling fan with the heatsink, dial up mode. Also, you can use it for removing the motherboard and replacing the power jack. By the way, if the power jack is loose you can use this tutorial for resoldering the jack yourself.
Let’s say you repaired the laptop, assembled it and now it gets power but will not turn on. What could be wrong?
1. If you removed the CPU, make sure it’s seated properly inside the socket and the socket is LOCKED.
2. Make sure the memory is properly connected to the motherboard and making good connection with the slot. Try reseating the module inside the slot.