Gary, Sounds like something was soldered incorrectly or another component was damaged during the repair. I have actually fixed this issue a few times and ended up replacing one of the capacitors right next to the filter. There is also another filter jut below the one you repaired that may need replaced. Test with a different LCD screen as well. If you need to send it in just contact me.

Hey if you guys need to know where the diode and backlight filter are, we provide a free diagram for installation along with our kits. [Spam]

Anytime you jump a component there will be more issues in the future. The parts are there for a reason. You should get it repaired correctly. If you need help you can message me. Or if you need the parts you can get them [on eBay]