Dell Laptop 3521 issue with display!!multicolored lines showed UP

Hi bsyed22,

I would suggest you to run hardware diagnostics on the system for hardware functionality, by following the steps below:

Reboot and press to enter the Boot MenuWhen the boot device list appears, highlight ‘Diagnostics’ and press EnterThe computer begins to run the ‘Pre-boot System Assessment’, a series of embedded diagnostics that perform initial testing on your system board, keyboard, hard drive, and displayIn case any hardware component is bad, you will get a corresponding error

You may connect an external monitor to the laptop if possible and check whether you are getting proper display on external screen or not. You can also run LCD diagnostics on the system to check if there is any issue with the LCD of the system. Follow the steps below to perform LCD diagnostics:

Turn off the systemPress and hold down ‘D’ key on the keyboard while system is offNow press the power button while holding down the ‘D’ key

If you get the solid colors flashing on the screen, LCD is working fine. Otherwise, the issue is with the LCD and it is needed to be replaced.

You may update the system BIOS. Please refer to the link: http://dell.to/1c78hFt. Please paste a screenshot of ‘Device Manager’ with ‘Display Adapters’ extended. You may follow the steps below:

Press ‘Windows’ key + R on ‘Desktop’ screen.Type ‘devmgmt.msc’ in run box and press ‘Enter’.Click > sign next to ‘Display Adapters’.

Keep me posted with the results. I will be glad to assist you.

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