External display for 6600m.

Good morning all. I have a 6600M that was repaired recently by flex. The front panel took a hit from a close lightning strike and had to be replaced. Finally had time to hook my hp 24 inch monitor back up to it. It is not picking up the image from the 6600m to the monitor. Screen on the 6600m is good but no go on the monitor. I did notice that on the beginning screen it now says madesto. this is different from what it was. My thought is that instead of original parts they used madesto parts. Could this be causing my display not to work or is there someplace on the radio that needs to be changed. I have been looking at this for 2 days now. 😕

John

KB4OIF