Question about Mitsubishi WS-55511 55" Rear Projection Television

8 Answers

Mitsubishi WS-55511 - No Power - No Blinking Light

I have read several posts in these forums, none of which give a blinking light. I can hear a very high frequency when plugging the cord into a power outlet, but I cannot get any power from the control panel...nor can I get the blinking light. Help?

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  • 3 more comments 
  • getsarge Aug 19, 2008

    Who would have a power supply? Is it something that a half-wit could install?

  • getsarge Aug 19, 2008

    Is there a way test to see if it's the power supply?

  • getsarge Aug 19, 2008

    I have access to an TV broadcast engineer, I'm fairly savvy myself and I can take instruction quite well.

  • getsarge Aug 24, 2008

    No rating on the meter, I reckon that's a great piece to replace. Looks like a simple cut, unscrew, put new piece on, solder, and screw back on. Who is a viable source to order the part through?
    - Thanks

  • getsarge Aug 24, 2008

    Sorry, my last comment was vague. The DM power board still shows the green light in the bottom...I'm guessing it's ok (not the blinking light, steady small green light).
    The Horizontal Output Transistor shows no activity when connected to a meter, which I'm guessing is the problem.
    Who is a viable source for parts?
    -Thanks EC

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8 Answers

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Http://www.asm-service-manual.com/List/Mitsubishi%20List%20ASM.htm

http://www.electronic-repair-kits.com/index.html
the above links will provide u with the manual for ur device plus a best sorce for any replacement of parts required.
pls do rate the solution

thanks.
regards.
fixya expert team.

Posted on Aug 24, 2008

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  • Mitsubishi Master
  • 19,396 Answers

Try unplugging power for a couple of hour s before proceeding with anything else, I know it sounds silly but it is first thing to try.
If you get no light at all it is probably power supply fuse gone.

Posted on Aug 24, 2008

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Dear sir/madam,

Sounds identical to the capacitor problems. Check voltages are all ok on DM board power supply and standby power supplies.

thanks
good luck

Posted on Aug 19, 2008

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T could be a coolant leak around the signal board that's causing your problem,
Look for a thin film of liquid or an oily substance on the board around the base of anyone of the CRT's and the 24 volt line is might be held low because of a bad vertical output IC or a convergence IC. you should take it to a repairman....

Posted on Aug 19, 2008

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The noise you are hearing is from oone or more parts in the switch-mode power supply that are oscillating. If this is all you get when attempting to startup the set, the problem is in the power supply itself or it is a dead short further along. The power supply it trying to work and failing. The first thing to check is the horizontal output transistor. This is a 3-legged part attached to a heatsink and shouldbe close to the flyback transformer (part with large red wire coming out of the top). Check this using an ohmmeter. You should read resistance when measuring between either outer leg and the center. If any of those read zero(0) in both directions, the part is bad and should be replaced.

Try that first. If that fails to resolve the problem, update this and we'll continue on to the next step.

Dan

Posted on Aug 19, 2008

  • ABRsvcs Aug 25, 2008

    Perhaps you mis-understood. Since the set is not powered up, there will be no voltage at the horizontal output transistor. You need to make the measurements I outlined above with the set unplugged.



    Second: If the power supply does not kick in at all and the transistor measures OK, then we need to look at the power supply area itself. Close to the area where the AC cord connects to the board you should see some capacitors that have a value in the 2.2-4.7ufd range with a working voltage of 200V or more. Try replacing those caps and report your results here.



    Dan

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Hello,
High frequency can be hear when TV got problem of Horizontal Output Transistor short circuit. If you are not tech-person, please call tv repairman. If you are tec-person, let me know to guide you further.
Regards,

Posted on Aug 19, 2008

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Dear,
do a dusting and about the voice that u can hear, can be because of drysoldering.. sometimes it happens that due to drysoldering or cracks, noise feels from inside.
check carefully for any drysoldering, more prob. at the power supply section..check main filteration cap. ..

Posted on Aug 19, 2008

  • SALMAN NASEER Aug 19, 2008

    check it and give feedback. if u have already tested this situation then inform me the conditions so that i try my best to achieve the goal.



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This can be a problem with the powersupply of the television that's why you hear a high frequency noise and there's no power or any light coming on , the power supply may gone bad and needs replacement..

Good luck.......

Posted on Aug 19, 2008

  • 1 more comment 
  • Mark Gil
    Mark Gil Aug 19, 2008

    You can buy it to a electronic store and if you have some knowledge with electronics you can do it by yourself but if not I suggest ask for someone who knows electronics and ask them to replace it for you or take it to a repair center and let them replace it...

    Good luck........


  • Mark Gil
    Mark Gil Aug 19, 2008

    You can use a tester or volt meter hopefully you have a device like that to be use in testing the power supply...

  • Mark Gil
    Mark Gil Aug 24, 2008

    Yes, i think thats really the problem, you can get it to a electronic store near you..



    Good luck.........

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