MRV700VR
EXT1 is not an error - that message means that the dvd player is on input "EXT1" - so it is trying to display whatever is connected to EXT1 in the back of your DVD player, whether it is a cable/sat box, another vhs player, etc. The message may be getting displayed for a number of reasons - but, if you put in an incompatilbe/unfinalized disc type, and it is not able to play that disc, it may default to EXT1 b/c it is searching for some type of usable signal.
The MRV700VR is only compatible with certain discs types - and the disc types that you are trying to insert must also be finalized discs. I would reccomend only using the compatible disc types listed in your user's manual - some of them are getting harder-to-find. 16x discs are very iffy with this machine. 8x discs are best.
I have the full user's manual, so I can give you any more details that you request.
-Tha Mp3 Doctor
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