Please clarify "technical display". Posting a screenshot would be helpful, as this will help contributors understand precisely what you see.
Take a screenshot on your iPad - Apple Support
You can post a screenshot, suitably redacted (using markup tools) as needed to obscure any personal or sensitive information, using the image button that you'll see at the bottom of the message editor:
If the item or lines are not present in the screenshot image, then you have demonstrated that you have a hardware issue that will require repair. If the lines are visible in the screenshot, the something other than a hardware fault will be the cause.
Note: When reviewing the image, rotating the iPad screen orientation by 90°, from Portrait to Landscape, will ensure that the image does not coincide with screen defects if present.
If the test indicates that a hardware fault, a visit to the Genius Bar at your local Apple Store is recommended - where the technicians will be able to test and assess your iPad. This will likely inform your next steps:
Genius Bar Reservation and Apple Support Options - Apple
iPad Repair – Official Apple Support
