Toshiba TDP-TW300U Service Manual page 38

Dim image
Substitute with known good lamp.
Image brighter?
Substitute with known good Main board.
Image brighter?
Replace the optical engine.
Bad or missing tint or color.
Distorted image, excess noise, rolling, torn, frozen, "Plaid" image, repeated single image or shifted image.
Make sure cables are good.
Check the color wheel delay index value in the service mode.
Image good?
Replace the Main board.
Yes
No
Yes
No
Yes
No
6-6
Chapter 6
Replace the lamp.
Replace the Main board.
Problem resolved.