if your projector displays unwanted dots then the DMD chip has stuck pixels
a new chip will fix that problem
repairs must be done by engineers, 
the projector has to be dismantled to replace this chip.

replacement dmd chip for casio projectors
xj-a130 xj-a131 xj-a135 xj-a140 xj-a141 xj-a145
xj-m130 xj-m145 xj-a140 xj-a150 
1076-6038B/1076-6039B/1076-6338B/6339B
1024 by 768 resolution

Projector DMD Chip 8060-6038B 8060-6039B/8060-6438B/6439B

used , tested, no bad pixels.
removed from previous equipment, will have traces of heatsink compound on the back.

more heatsink compound is required when installing these chips.

please state projector model when ordering.