H Kiran.
Whats the problem with the display? Has the player been modded or opened up for any reason? There could be another reason for it not working.
The display PCB is only available from Marantz but I have a couple spare if you need one
The display PCB is easy to fit. You have to remove the lid and front plate of the player, to remove the lid it's just 6 screws 2 each side and 2 at the back. To remove the front plate you have to remove the 2 screws on the top connecting it to the chassis (you will see them when you remove the lid) and take off the trim from the transport mech (there are 2 clips under the tray), you will also see 2 clips holding the front plate to the chassis on the sides unclip these and pull the top it of the front plate forward, give it a bit of a wiggle and it will come free. You also need to disconnect the head phone cable and the ribbon cable from the main PCB. I think there are then 7 screws and a couple of clips holding the display PCB to the front plate just remove these fit the new PCB and reassemble.
Cheers,
Mags.