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This set should have the self check feature--turn it on and when the green power light comes on and then goes off-----ON THE FRONT OF THE SET PRESS both MENU AND INPUT BUTTONS at the same time and hold them both in for at least 5 seconds--then release both buttons----the power light should blink a two digit error code---for example: 2 blinks, a pause and 2 blinks---
The set will repeat the code about 10 times
Let me know what error code you get and I will tell you what it means and maybe how to fix the problem.
I found this list of codes Error Code Probable Cause 12 No error detected 22 Recovery from momentary Reset 32 Lamp Cover open 33 Air Filter Cover open 34 Lamp abnormality 35 Chassis Fan failure 36 Exhaust (Back Cover) or Lamp Ballast Fan failure 37 Engine (DMD or Lamp) Fan failure 38 Excess Lamp Temperature 39 Excess DMD Temperature 41 Short Detected 44 DVI Cable (between Chassis and Engine) disconnected