What you can do in the meantime is clean the connectors up a bit.
 Take the loom off and put in a bowl, sprinkle a liberal dose of bicarb soda over it  making sure it gets inside the connectors and pour vinegar on top... it fizzes away a lot of the tarnishing. Make sure you rinse liberally with water afterwards and then dip into methylated spirits and shake dry.. the meths disperses any water and the loom will dry quickly.
On the board, the copper connections can be cleaned and then  flow a little solder over each... this fattens them up a bit and compensates for any loss of tension on the pins in the loom.
So long as you don't have a broken pin inside a connector, this tip will alleviate any issues