Has your issue been resolved? If not, let me try to help.
Recently I was facing "dimming" issue with my Baleno's digital clock: the digits had gone dim. It turned out its PCB was suffering from dry soldering. Its joints were re-soldered and it worked!
In my case the clock was working but the digits were too dim to be intelligible. You can try doing the same: take the clock to a TV/Tape/Mobile/UPS repair shop and request them to re-resolder the joints. A TV/Tape repair guy may actually troubleshoot any other issues that might be there.
I hope re-soldering the PCB would bring your clock back to life.
Best of luck!