RetroGaming

CRT’s don’t ‘kinda’ break. I suspect you are seeing some kind of wire that makes up the structure of the set ans it visibly fades when it warms up.

Bad electrolytic capacitor, they dry out eventually... or bad solder joint, could have been aggravated by the physical shock.

The only thing that could have happened really is the yoke could have become misaligned if the tape that holds it to the tube was not holding very well. The convergence rings have lockrings on them that usually wouldn't be effected by a hit or drop, but if they were loose they could shift as well.

The potential damage could range from slightly misaligned colors (convergence) to geometry warping (caused by yoke misalignment). To fix either of these you would likely need to open the TV to service it manually, which you should do anyways to adjust the focus potentiometer and the H/V Width potentiometers to reduce overscan. Only do this if you are comfortable with line voltage and have insulated electricians tools + gloves, as the TV must be plugged in and on top make adjustments. If you arent comfortable or cant be safe, you will just have to live with whatever you cannot fix with the service manual alone.

Most likely, nothing really changed. Unless it was hard enough to crack the plastic shell, it probably didnt do much of anything to the internals, unless it had a built in VJS or DVD player, as those can be more sensitive to kinetic shock.