Hello Sampath,
welcome to the Polycom Community.
The community's Video FAQ contains this post here:
Jun 23,2014 Question: How can I change the video output signal on a HDX system?
Answer: Pressing the display button on the remote for more than 2 seconds will provide an option to toggle between the relevant signals (VGA, Component etc.)
You may have simply changed the video output or somehow factory defaulted the unit.
Please contact your Polycom reseller if you require further support.
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Best Regards
Steffen Baier
Polycom Global Services
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The title Polycom Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. My official "day" Job is 3rd Level support at Poly but I am unable to provide official support via the community.
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Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's
