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If HP Support Assistant detects updates, a list of updates displays in the Updates available window. Click here to download the HP Support Assistant.Ĭlick My devices on the top of the HP Support Assistant window, and then click Updates in the window for your device.This tool will install the required drivers for the laptop: Now, let us download and run the HP Support Assistant tool. Right-click on the display graphics drivers and select uninstall. In Windows, search for and open Device Manager.ĭouble-click a device type (for example, double-click Display Adapters) to view the devices in that category. Post that let us uninstall and reinstall the display drivers by following the below steps: If the white lines appear then please restart the laptop so that we get a good display. Now, let the laptop enter the suspension mode and then resume from it. Reconnect the battery and plug the AC adapter.

Press and hold the power button for 15 seconds.

Disconnected AC adapter from the laptop.

I recommend you to perform the following steps to isolate the issue and arrive at a fix:

Are you referring to the sleep mode by saying suspension?.

Did any software changes or updates happen on the laptop after which this issue started?.

I would like to know the following information to assist you better: Not to worry, I'll be glad to assist you with this case. The display seems to be fine if the laptop is restarted and issue reoccurs when suspension occurs. I understand that you have an HP Notebook - 15-ac617nl and the display has white vertical lines when it restores from suspend mode.