It is illegal for the consumer/ user to change the TX crystal.

Sport, please do not lead others astray on this issue. I realize you are reading the regs and trying to draw conclusions, but you are off base here. You cannot change the TX xtal, even if it is accessible from the outside of the radio. You do need to be certified/qualified to perform the xtal change. If you want to change freqs on the TX, get a synth based radio or a radio that uses modules. You can swap user accessible FCC certified modules without an issue.

There are good reasons for this restriction. As opjose mentioned with his misfortune, all may seem to work fine with your stuff after you changed the TX xtal, but you might be throwing out RF crap on other channels. If someone broke federal regulations, and by that act, caused me to lose my property, and is unwilling to make things right, I would probably file a lawsuit if the loss was substantial.

OP, as others have said, yes, a xtal can go bad. As others have posted, try replacing the RX xtal, and if the RX still doesn’t work, send both the RX and TX in for service.