I'm looking for an PCB FFC connector to replace the FH26-24S-0.3SHW(05), which I cannot find stocked anywhere. I've looked for replacements with .3mm pitch, .2mm flex thickness, and 24 contacts, but cannot find any via either DigiKey or Mouser. I can, however, find connectors with 25 pins. Would having one extra unused contact on the PCB FFC connector cause problems when using a 24-contact cable, assuming the cable was seated such that contacts 1-24 were aligned properly?
Better try to find 24P connector from different manufacturer or different type.
It would be potential risk to use 25P. Yes, it will probably work. But imagine somebody will service that device (a year later) and will forget (or won't know at all) that there is 25P connector and 24P flat flex cable and will connect it misaligned. There could be some sort of short, which could fry your LCD.
I would use it ONLY as a temporary "solution".