Isn’t this the common theme of the Technical Troubleshooting section?
1) Member buys LD player on-line and has it shipped
2) Member tells us about their experience and frustration about getting a damaged player
3) We say, “you know, you should really try and purchase a player locally as players’ are fragile.”
4) Member says, “I just can’t find a player locally”. And we say, “Um…. Well I guess you have no choice then.”
5) Member buys another play on-line and has it shipped again
6) Member tells us again about their experience and frustration about getting a damaged player
7) same as “3”
8) same as “4”
Anyway, shipping an LD player is always a risk one way or another. Most of the issue are mechanical and sometimes they can be fixed. This might explain why your LX-H670 has its playback issues (probably knocked its alignment off).
As to showing up totally dead (no power), that probably means the player was likely dead before being shipped out.