Keyless Entry

As of this morning my keyless entry has stopped working! :(

I messed around until I found the unit which is unbranded. Checked fuses, which were fine.

The bit which lights up to indicate its locked doesnt light up. Keyfob works (changed batteries to make sure). Seems completely dead.

Any ideas would be appreciated!

Also cost like 5 quid on ebay for another one. But i dont know how you wire it will it plug in to the existing wires?! (silly question maybe)

Looks like ill be entering through the boot for the time being lol :D