Picture tube for 60 in' mitsubishi it shows only a black screen but you can still hear it

SOURCE: Mitsubishi television

1. NO VIDEO, BUT HAS VIDEO WITH PIP ON. CHECK C763 (1UF 50V) ON THE BASE OF Q715, LOCATED ON THE UCOM-PCB. 2. NO MAIN VIDEO, THERE IS VIDEO IN PIP ON EXT1 AND EXT2:-CHECK FOR 1VPP OF LUMINANCE ON PIN 1 OF IC7000, IF MISSING OR LOW CHECK THE VALUE OF C7001 (4.7UF 35V), LOCATED ON THE PIP-PCB. THIS CAP MAY LEAK ELECTROLYTE ONTO THE BOARD AND OPENED A FEED THROUGH IN THE PATH BETWEEN C7001 POSITIVE LEAD AND THE EMITTER OF Q7003 OR CAUSE INTERMITTENT COLOR. PART # 181P504090. (CHECK ALL 'SMD' ELECTROLYTICS AND TRACES ON PIP) 3. NO MAIN OR PIP VIDEO, CHECK C7014, 47 UFD 16V ON THE PIP PCB. PART # 181P502060 4. CHECK FOR 7.2V DC ON THE BASE OF Q7003, IF LOW OR MISSING. CHECK THE VALUE OF R7002 (150 OHM 1/10W).LOCATED ON THE PIP-PWB. PART # 103P401050 5. SUSPECT R2045/R2048 (6.8 OHM 3W) FOR OPEN/RAISED VALUE. LOCATED ON PCB-SIGNAL AT 5V REGULATOR IC2003 PIN 5.

SOURCE: replacement of the green lamp(picture tube) in a

You can probably purchase a smilar set on Craig's list for $300.00, at least that's what they go for in the Austin Texas area.
A new tube may be too expensive and difficult to replace.

SOURCE: Mitsubishi WS-65809 - works, but screen won't power on.

yes that is correct 12 is normal...make sure all connectors are plugged in and in the correct places . conectors should be marked with letters that match the marking on the circuit board. Then look for heaters , in the glass bottom of the picture tubes(CRTs) there should be a little orange glow visable though the neck of the CRTs just above where the crt boards plugg onto the bottom. if the heaters are not glowing then check your wires to the crt boards again , you probly tugged one of them too hard during disassembly also check for cracked solder in the heater circuit......Oh yeah, you didn't mention -Does the TV get high voltage ??? thats important to having a picture......If you see the heaters glowing when the tv is on then look down into the lenses of the crts . If you see a brite color horizontal line closer to one side in each of them then you know most of the tv is working. If that line is curved then the tv probly detects that the convergence circuit is not working and it is blanking video.
OR -----
the error is 21 (see what number it ends the sequence with..) . Error 21 is X_Ray protect and you probly plugged one of the connectors into the diagnosic connector(near the high voltage transformer- normally nothing goes there) . If that is the case then somthing in the H.V. circuit could have been permanently damaged and now the tv has a new problem and wont work even if you put that connector in the right place.

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SOURCE: picture on the mitsubishi HD1080 VS-50111

Nope, But your convergenjce chip is about to die. i would turn it off and leave it off and call a tech to rectify it before it takes out the whole board or all 3 as some capacitors are also overheating. Parts $100+Labour of about 1.5 hrs at this stage! later it will be $600

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SOURCE: i have a mitsubishi wd-60735 tv when i turn the tv

Did you recently replace the lamp? If you did then it might be the new lamp. I mistakenly bought an aftermarket lamp to replace mine and it would not work consistently. Apparently if it is not an Mitsubishi original lamp it has issues, because after I replaced it with a Mitsubishi lamp it worked perfectly fine.