Why dont the screen come on when the laptop starts up

Robert, disconnect all power sources, battery, plug, usb devices, then hold down the power button for a minute to clear residual charge. This should reset your bios. If it does start up go to the diagnostic tab and run the hard-drive and memory Tests. See what it shows. This could be as simple as a bad memory module to as bad as a failed CPU. For the Bios follow this from the service manual.

"An interruption during a BIOS flash procedure (e.g. a power outage) can corrupt the BIOS code, which will cause the system to go into an unbootable state. You need to access and execute the boot block program to reboot the computer and

recover the regular BIOS code." If it turns out it is your Bios you may want to try this first.

BIOS recovery

An interruption during a BIOS flash procedure (e.g. a power outage) can corrupt

the BIOS code, which will cause the system to go into an unbootable state. You

need to access and execute the boot block program to reboot the computer and

recover the regular BIOS code.

Creating the Crisis Recovery disk

To create the Crisis Recovery disk:

1 Prepare a removable USB storage device with a capacity size greater than 10 MB.

Note that all data on the USB storage device will be cleared during the creation of the crisis disk.

2 Set up a computer running the Windows XP or Windows Vista OS and plug in the USB storage device into an available USB port.

3 Decompress the Crisis Package Source. download that from here

4 Select WINCRIS.exe and then select Run as administrator.

5 Keep the default settings and then click Start button.

6 When the pop-up warning dialog box appears, click OK to create the crisis disk.

7 Click No if you do not want to create another crisis disk.

8 Eject and reconnect the USB removable storage device, and make sure it contains the BIOS.wph, MINIDOS.sys, and PHLASH16.exe files.

Performing a BIOS recovery

To perform a BIOS recovery:

1 Shut down the BIOS failed-computer.

2 Connect the USB storage device containing the Crisis Recovery disk files to the failed computer.

3 Press and hold the Fn+Esc keys (this is the BIOS recovery hotkey), then press the power button.

The BIOS recovery process begins. When the process is complete the computer will automatically reboot.

4 Disconnect the USB storage device from the computer.

5 Perform a BIOS flash procedure to update the BIOS firmware.

Caution

Observe the following when performing a BIOS recovery:

• Make sure the battery pack is installed to the system and that the computer is connected to a UPS unit during the BIOS recovery and BIOS flash procedures.

• The BIOS crisis recovery disk should be prepared in a computer running the Windows XP or Windows Vista OS.

Running the Flash utility:

To run the Flash utility:

1 Rename the BIOS file as “XXXXXXX.FD”.

2 Copy the “XXXXXXX.FD” file to a bootable USB device containing the Crisis Recovery disk files.

3 Turn off the computer.

4 Insert the USB device containing the renamed BIOS file and the Crisis Recovery disk files to any USB port.

5 Press and hold the Fn+Esc keys (this is the BIOS recovery hotkey), then press the power button.

6 Release the Fn+Esc keys after POST.