I recently got this module from ebay and had trouble getting it's back light on as there were no schematics. In the process, I had to take the screen off the PCB to reverse engineer the traces. I found a rubber like connector between terminals on the PCB and the LCD. From a quick search I learnt that these are called elastomeric connectors.
In the past I have had trouble getting a display to work once one of these came off. I have had to repeatedly disassemble and reassemble displays to eventually get them to work. How do I place these right? What precautions should I use while handling these elastomeric connectors? Are these hard to use?