20 Most Recent Sansui HDPDP4200 42 in. HD-Ready Plasma Television - Page 9 Questions & Answers

Panel lock Open with remote control

Try using the TV control buttons which will be placed on the backside of the TV or maybe on the bottom of your TV. There you will find a key to go to the menu/settings and there you can unlock your TV. It is the only option to unlock the TV screen lock otherwise you will have to purchase another remote.

https://www.cnet.com/forums/discussions/panasonic-camcorder-nv-ds65-dew-indicator-problem-62326/

Yep do google search, ebay, amazon search.

I have found older replacement remotes some reasonable some more expensive. But to get OEM functions you need an original(replacement).

You usually get a list of codes with a universal remote

Does the roku have inputs for video and audio (Yellow is video red and white audio).

Hello, Leonard - Perhaps the information here will prove instructive: https://codesforuniversalremotes.com/remote-control-codes-sansui-tvs/ Best wishes.