Loose display cables, old drivers or a faulty graphic chip can cause a flickering display. Guessing does not work, instead, a reliable computer laptop repair service will be able to scan both hardware and software. They will also check the display panel, internal connection and install or update drivers where needed. In other instances, the problem might be concerned with inverter or backlight. Professional assessment allows covering the unnecessary changing out of parts and does not further aggravate the issue with time.