I was wondering if any other tech's can help out another tech. I'm working on a Mits ws-55805 customer abaneded the set so i thoght to fix it and resale it. there was no high votage that the first problem i replaced the flyback then the guns wasent lighting up fiexed that problem now that I got high voltage and guns lite thers no sound or pictuer I went throgh antens a and b swich and rca jacks to no change. there is no colent leack on the bord I pulled the bords out and check for bad soder jonts...I get no osd at all nothing please help if you work on thes sets could it be the signel bord?
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FIRST CHECK CONNECTOR "DR" FOR PROPER CONNECTION, BETWEEN THE DEFL MINI PCB AND THE MAIN PCB. 2. CHECK C5A09 AND C5A50 BOTH 33 UFD 50 V OFF OF IC5A01 ON PCB-DEFL MINI. 3. CHECK FOR LEAKY IC5A03 PART # 270P704010 ON PCB-DEFL MINI 4. SUSPECT THE HIGH VOLTAGE BLOCK PART # 920P016010 IF STILL NO HELP PROBLEM CAN BE INTERMITTENT (TEMPERATURE RELATED) CAUSED BY IC7D04 PART # 275P245010 ON THE DOUBLER PCB THIS WOULD BE A THIN VERTICAL LINE IN CENTER, IF GUNS WERE ON.
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A full service manual is available online---I will presume you tried to unplug it for a while and then power back to see if will reset itself.
This set has three hidden menus---one is the OPTION menu--in that menu with the Mitsubishi remote you can do a hard reset of the entire set= sets all back to factory except convergence adjustments which are stored in another area--cures all kinds of oddball issues.
I can give you a link to the manual and the page numbers for the OPTION menu.
Note: the other two hidden menus are Convergence and adjustment--do not go into adjustment menu as one wrong move and poof!
Check Your Rear Projection Light Open Back Cover it a little Door on the back ov your TV Set Possibilty Light Burn Out ....Cause of this Problem Fan Malfunctioning Or The Bulb as to be change for new one ... Type The Brand and the Model ov your TV According To your Model it will gave you a list ov different Light Projector Make Shure You dont Touch the bulb with your bare Hand when you put it On Because those light produce very hi Temperature and cant burn out immediatly or explode.
check this site first http://www.chrisandnat.com/Projects/BlinkingTV/blink.htm if you dont have this in your set then check convergance amp ic. http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm