I got a used Compaq EVO N115 notebook and when I plug the power supply in and turn the computer on the lights showing the battery is being charged and a green light on the display turn on but the screen remains blank and the computer doesn't boot up.
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Re: boot up problem
It is possibly the RAM it may have ceased. Look at it underneath held in by two screws.
Take it out and examine it then put it back. The motherboard seems ok because you said the lights are lighting up. Sometimes the ram can stop even the bios and nothing can boot up.
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First - re-seat the harddisk and reboot the computer. If the computer does not boot up then reboot andgo into the BIOS configuration to see if the BIOS detects the hard drive. If itdoesn't detect the hard drive then it could be faulty..Then the hard drive needsto be replaced in the computer/laptop, Windows installed and the computer orlaptop's device drivers plus your programs etc. to get a functioningcomputer/laptop again.
Disconnect the power cable from the Notebook and then remove the Battery pack. While the Battery pack is removed, press and hold the power button on the Notebook for 15 seconds.
Next, reinsert the Battery pack and connect the power cord to the Notebook and turn it ON. While the Computer is booting, you can view the information on the bottom of the screen to get to the Setup Screen.
On the Setup screen, use the right arrow key to highlight the "Exit" menu, then select the option "load/get default" and press the Enter key followed by F10 keypress to reset the BIOS and save and exit the screen.
I have the same problem. When I follow these steps the laptop finally starts.
1) Let the bottom of the laptop somewhere you can warm up it a bit. Be very careful about this. The laptop´s bottom is made of plastic !. In summer I leave the laptop upside down under the sun for about 15 minutes and it´s ok.
2) Plug and unplug the dc connector (not the one at the ac outlet), wait until the small green led lights and inmediatly after it happens, press the power button.
3) Repeat step 2 as many times as necessary.
4) Do not shutdown the laptop. Always choose ´suspend´.
hi check u install your wireless lan driver are correct.
check your dns and ip setting if they needed to connect internet.
othyerwise set it to automatically.
check your router and wlan configure properly.