Who knows really, I have had one running for about 13 months now with no problems.
Taking the chassis off is not that bad, just take your time, If you have access to the back of it you don't even need to pull the monitor out of the cab, but if you do have to remove it, get help and be careful. and never hold or pick up a monitor from the back always have the tube against your chest, I broke a tubes neck before, luckily it had alot of burn so no big loss.