Hi, did you solve this problem? I'm curious because I am taking the advice of others on this forum and buying a new LCD display kit from earthLCD. The kit includes the display AND the controller. I'm wondering if an incompatible controller may be your problem? The kit...SK-3012R...has been sold to quite a few users in the same boat we are in with great results I'm told. You will need a 12 volt power supply and a db9 to db15 adapter (which it sounds like you have). If you would, let me know how you solved your problem if you have. Thanks and have a good one.