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You need a set of "star keys" you can buy them at a auto parts store. I can't see the model number otherwise I could get you the part number for your lid lock. It is suppose to lock start to finish as you described it was doing. I'm a tech so can get you part number but only with a model number
The front is called the bazel, the screws are hidden behind small round rubber cups, some are dome shape and others are flat, carefully remove them with a fine flat head screwdriver in the order that they are removed. Some laptops may have screws on the side, remember to put one finger under so the screen does not get scratched.
Hi there. Remove the laptop battery and the AC power supply, open the lid as far back as you can take it. Get a small flat headed screwdriver, now, you have to take off the keyboard bezel, this is the strip of plastic above the keyboard with the power button on it, the best way to remove it is to start by the on/off button by gently prying the bezel up from the lid hinge, once you have one side out gently pull it up using your fingers, it will unclip and lift away. Next you have to remove 2 screws from the top of the keyboard, these should be visible to you, once the screws are out carefully lift the keyboard up, you will see a ribbon cable that is connected to the motherboard, gently pull the tab up on the connector that the ribbon cable sits in and it should release it and you can now remove the keyboard and replace it. To re-assemble just follow my direction in reverse. Please post back with the results and for any additional advice if needed.
sounds like a hardware problem....if u know how to assemble the laptop.it will be easy for u to fix that problem....all that things are connected to the mainboard..re insert all the cables what is loosen...regarding the headphone jack,if you have an extra jack you can replace that by resolder.
I believe that the 4020 and 3620 have the same chassis. See if this helps
To the left of the battery there is an I/O cover with 2 screws, then the heat sink cover has 2 screws. There you should see the Thermal Unit (fan). It has 4 screws. Take those out and lift the unit out.
Let me know , curious to see if they are indeed the same chassis. If I could be of further assistance, let me know. If this helps or solves the issue, please rate it. Thanks, Joe