Question about Mitsubishi WS-65819 TV

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65 INCH PROJECTION SCREEN IS SUPER BRIGHT

MY MITSUBISHI 65 INCH PROJECTION MODEL# WS-65819 TV SCREEN IS SUPER BRIGHT WHEN I TURN IT ON. I HIT THE SIDE OF THE TV AND IT WENT AWAY FOR A WHILE THEN IT CAME BACK. NOW IT STAYS SUPER BRIGHT AT ALL TIMES. WHATS WRONG?

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This model is equipped with a self-diagnosis feature to help with diagnosis of shutdown problems. To activate this turn the unit on let it shutdown then press the input and menu buttons on the front panel simultaneously and hold them in for 5 seconds after 5 seconds the power LED on the front panel will blink a two digit sequence. This will be one set of blinks a short pause then another set of blinks, this will repeat 5 times. 1 - 2 = no error detected 2 - 1 = X-ray protect (high voltage or beam current) 2 - 2 = Short protect (short protect monitors low voltage supplies) 2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection) 2 - 4 = Vertical protect (usually loss of vertical from the source) 1. SHUTDOWN AT POWER WITH SELF DIAGNOSIS ERROR 2 2. CHECK FOR LEAKY C9A60 470 PF 1000 V PART # 154P400030, PARALLEL TO D9A57 ON THE POWER PCB (NOT SHOWN IN THE SCHEMATIC). 2. SHUTDOWN AT POWER WITH SELF DIAGNOSIS ERROR 2 2. CHECK FOR OPEN FUSES F9A04 AND F9A05 PART # 283P043090 ON THE +24 AND -24 VOLT LINES. IF THE FUSES ARE OPEN THE CONVERGENCE OUTPUT CIRCUIT WOULD BE SUSPECT. 3. SELF-DIAGNOSIS INDICATES SHORT PROTECT. CHECK FOR A SHORTED IC4B01 PART # 270P261020 (VERTICAL OUTPUT) LOADING 24-VOLT SUPPLY LINE. LOCATED ON THE MAIN PCB

Posted on Sep 19, 2007

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Super bright is due to failure in video section. 1 video supply might be absent. 2 g2 voltage mighi be high gue to some part defective at ground side. 3 chroma or jungle ic not getting supply or defective. 4 luminance section defective. BUT AS you are also saying that it came once after hitting on top so there is also possibility of loose contact also. good luck.

Posted on Sep 19, 2007

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