I have a small computer repair shop next to a large University, so I'm pretty familiar with Laptop repair.
I an attempting to replace a keyboard on a Presario R4000 notebook. The problem is, I can't find how to remove the old one. I have the "control panel" off, all the screws out and the panel is loose in all areas except the very center where the power button is. Something is holding it there and of course, I don't want to force it and damage the plastic panel.
Any suggestions will be appreciated!
The R4000 series bezel has a tiny tab on the bottom (keyboard) edge in the middle. You need to release the bezel from the hinge covers and pull/push towards the keyboard. this will release the tab. Michael Neill
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your only supposed to pull the hinge out carefully a small amount so the flex cable comes loose, then insert the new keyboards connector there and push them back into place. Its pretty much the same thing in all brands of laptops.
if you have broken the connector, you will probably be looking at buying a new motherboard unless you find someone to replace the broken connector.
The problem you describe can be caused by two different things. The two are not related to each other in any way.
The first, which is more common on desktop computers than laptop computers, is a thermal problem. The video chipset is overheating and causing a shutdown of the video. It is possible that this overheating is actually the cpu, but I don't think so, based on your description.
The second is the video power inverter chip. The power needed to keep the lcd screen lit up on a laptop is considerably more than what is needed to run the laptop itself. For this reason, a small power inverter chip is installed on laptops. It is usually found under the plastic bezal that surrounds the screen, and usually on the bottom. When this chip goes bad, the symptoms are as you have described.
Here's a couple things you can do before seeing a technician or teaching yourself to take apart your laptop. Plug in a different monitor; an external monitor and restart your computer. You should have a function option that will let you see two monitors at once. (that's the fn key, usually in the lower left of your keyboard). With two monitors showing exactly the same pictures, see if you can recreate your symptom.
If the problem is in the power inverter chip, the external monitor should remain on when the lcd monitor goes black.
If the problem is inside your computer (video or cpu overheating) then both monitors will go off.