Is it possible to get a Game Over in Maniac Mansion by taking too long to rescue Sandy?

In the recent playthrough of Maniac Mansion done by The Game Grumps, Danny suggested that the base game, outside of meltdown timers and such, is on a timer that will result in a Game Over if it expires.

However, I was under the impression that, while most cutscenes are indeed on timers that count in real-time, and the final cutscene implies an imminent loss, that it is not possible to lose by waiting too long, and instead the game will simply "run out" of cutscenes and continue indefinitely afterward.

Which is the truth?

Solution 1:

I once left the game running for over 5 days (in the background in DosBox) whilst leaving the PC downloading a large set of files. When I returned to the game I was still in the same room (the room with the plant).

There is nothing to force a game over if you leave the game running.

Solution 2:

Not according to this review at Moby Games

There is no time limit to defeating this game, unlike many games that were out at the time.

Additionally, the Ways to lose page at Maniac Mansion Fan makes no mention of running out of time, so I think it's safe to say that there's no time limit to rescuing Sandy.