Hello. I bought a PE5120 projector, used, very nice picture. The owner had zeroed the normal lamp hour counter, this projector has a lamp guarantee 700 hours or 1 year. I know that this projector has a counter for total hours. To know the total amount I have to be able to access the service menu. I have sent emails to benq, they will not tell how to access the service menu but instead suggest that I should try to search the internet for the information! So, if somebody knows how, please let me know too.