All but the bottom right and middle right are used it must therefore be one of these that is broken.
If the bottom right is broken the first letter can only be B
The second letter would be A
The third letter would be L or V
The fourth would be P
The word would be BALP or BAVP which are not words.

So it is the middle right that is broken then the first letter could be B or H. and the second letter would correspondingly be A or E
The third L or R
The fourth P or Q
The word could be BALQ or BARP or BARQ or BALP or BELP… HELP

And the rest is ME

or
The first letter could be:
BFH or L
If it is a B then we have no information about the broken pin (except that it is not in the top left or middle left)
For the other three we know which the broken pin is so starting with F the broken pin would be top right so the second letter would not exist.

If it is H the middle right is broken so the second letter would be E and so on – ending with the message HELP ME

Part 2
BFHL
NORZ
NORZ
KLMOU
DEHO
MNPX

By a systematic approach you can find BROKEN