Question about Mitsubishi WS-55807 TV
Set was working fine then when I turned on the other day I got a blue screen - had sound but no video. Changed inputs, tried dtv, dvd, etc, same thing. The remote also stopped working and the buttons the front seem dead. Can't change volume, etc. At first, the menu came up (once) but was all scrambled like convergence was way off, and in red,blue, green separately.
Now, menu will not come on, no buttons work, no video at all - just solid blue screen. Sound still passes through though? I really don't want to spend alot of $ to fix, but at the same time I don't want to trash it. Any ideas?
Good Day, luap356;
Look for fluid on the PCB's, if don't see any try this:
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/device 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. SELF- DIAGNOSIS INDICATE X-RAY. CHECK FOR A SHORTED IC5A03 PART # 270P704010 AND AN OPEN R5A73 82K ¼ WATT OFF PIN 2 OF IC5A02 ON THE MAIN PCB. 2. SELF DIAGNOSIS ERROR INDICATES SHORT PROTECT. 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. Good Luck, big IRISH.
Posted on Aug 07, 2008
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Posted on Jan 02, 2017
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