Lumia 820 Display Problem

[Epic Pie]

It's only been few days I got my phone back from Nokia after replacing broken screen (don't ask why it broke). Everything's working well, and updated with latest update. I was charging my phone through laptop's usb power. But suddenly, I don't really know why, but my phone display has gone dark. When I try to press power button to unlock my phone, I only have slight second to see my unlock screen (which is a little light blue-ish), then it goes blank. Strangely, it displays glance screen crystal clear.

I've tried taking out the battery for several seconds many times, even soft reset. Any suggestion? If I have to return to Nokia, do you think the warranty will cover it?

 

[N_LaRUE]

Short of doing a hard reset I would recommend taking it back since the screen was replaced by Nokia and I can't see them not honouring their work.

 

[Epic Pie]

Yeah, I guess I'll need to send it back to Nokia for the issue. Hopefully they don't blame on me and charge me though. It should be their fault.