We just had the screen replaced. Which involved replacing the MAPPS computer. The New MAPPS computer does not have RS232. Mori quoted $195.00 for USB to RS232 converter and $414.00 for MAPPS4b RS232 cable. This cable is just a DB9 to DB25 adapter. I think if I could get to the windows desktop I could use off the shelf hardware for about $25.00 How do I get to the Windows desktop under MAPPS?