Apply a dry and smooth cotton cloth perhaps folded on itself first on point 1 (be careful not to apply the direct metal of the iron as you risk melting the connector material) and heat it in that point WITHOUT MOVING but exercising only the weight of the iron for about 30 seconds and then on point 2 for about 20 seconds; immediately repeat a second time the heating on point 1 and then on 2 of the same connector (try it if you want) and then switch to the connector of the other display.
Reconnect the displays and screw them back in place and test before closing the body (remember that you need to insert a cartridge to see something on the screen): if before you had lines and / or glitches, now there should be no more (I had frightening glitches on a display and lines like those in the photo above on the other and I solved it totally).
As I said, the solution may not be definitive (maybe in 5, 10 or 20 years it will come back) but rearranging it takes a maximum of 45 minutes and is pretty safe.