When I power up my slab iqan md-4-7 module then nothing have been seen on display even parker logo not showing during power up. Only display is changed from black to light black and not showing anything. Please suggest me how I will rect

What you are seeing might be a symptom of a problem with flash memory error, fixed in 6.04 and also 5.08, see Release notes - IQANdesign 5

If the MD4 was running a software version 5.07 or older, or software version 6.00-6.03, then that is one thing I would suspect at least.

You could try to connect to the module with IQANrun to send a newer version of the application. But it is more likely that the module cannot be fixed in the field. Get in contact with your aftersales contact.