HP-41cx Won't Power Up

[pwright]

Greetings,

I have just acquired an HP-41cx and it won't power up after the long trip from California to Florida in a UPS truck. The unit did work fine about a week ago.

I've tried all of the tricks listed in the Forum Archive short of taking the device apart and will try them again.
https://www.hpmuseum.org/cgi-sys/cgiwrap...i?read=149

As to taking it apart and cleaning the flex circuits that doesn't look difficult but I am concerned about removing screws in 40 year old plastic. The '41cx is in pristine condition and I would really hate to crack the case removing screws.

Is there anything I'm missing? Any advice is appreciated.

Cheers