Connect an external monitor to the laptop and check if it shows a display OK.
'''''If there is a desktop display on the external monitor'''''
Use a torch and shine it at an angle close the the laptop's LCD screen to check if you can see a display on the LCD screen when the laptop is on. It will be very faint so try it in a darkened room to make it easier.
''If you can detect a display'' then you have a backlight problem. This could be caused by either a faulty backlight power supply, a faulty backlight power cable, a faulty lid switch or a faulty LCD screen
''If there is no display'' then you either have a faulty video cable, faulty video cable connection (at either end - motherboard or screen) or a faulty LCD screen.
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'''''If there is no desktop display on the external monitor''''' then you either have a faulty GPU or a faulty motherboard
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'''''If there is no desktop display on the external monitor''''' then you either have a faulty GPU or a faulty motherboard, (which is usually the same thing as the GPU is permanently mounted onto the motherboard)
Hi,
Connect an external monitor to the laptop and check if it shows a display OK.
'''''If there is a desktop display on the external monitor'''''
Use a torch and shine it at an angle close the the laptop's LCD screen to check if you can see a display on the LCD screen when the laptop is on. It will be very faint so try it in a darkened room to make it easier.
''If you can detect a display'' then you have a backlight problem. This could be caused by either a faulty backlight power supply, a faulty backlight power cable, a faulty lid switch or a faulty LCD screen
''If there is no display'' then you either have a faulty video cable, faulty video cable connection (at either end - motherboard or screen) or a faulty LCD screen.
'''''If there is no desktop display on the external monitor''''' then you either have a faulty GPU or a faulty motherboard