Hi there, 

When I turn on my rb15 laptop the screen flickers a lot and after some time it only shows vertical stripes in different colours.

In most cases the stripes show up after a few seconds, sometimes even right away (or the screen just stays black). In rare cases the flickering and stripes don’t show up at all and the laptop is usable, but only if I’m really lucky.

I would be very thankful for any help :-)