Well guys today I wanted to use my sharp qa-2500 panel without the overhead so i bought a broken optoma 615h with working bulb $25 I just took out the things i need like light source and power well i rig it up with my screen i had a fresnel in front and in back the light source was apx. 10inches from the panel it ran fine for a while then the middle started to turn yellow i was wtf, i turn it off to fking find my $200 screen bunt in the middle i was like mfker this sucks. I didnt use a condenser i am not sure what it does but it would of help i wish i knew, well i am just posting this to tell no one to right a store projector with a diyscreen because it will burn to **** oh well ebay here i come for a 14 or 15 inch burnt backlight lcd monitor