Question about Mitsubishi WS-55859 55" Rear Projection Television

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How much does it cost to repair a power supply circuit on a Mitsubishi WS55859 unit, parts and labor?

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  • jjday3 Sep 30, 2009

    I took it to a repair shop and they told me it was a power supply circuit problem. Several parts would have to be replaced in the circuit and that the total cost is $450.00

    The green light in front blinks constantly but the whole unit does not power up

  • SD Tech
    SD Tech May 11, 2010

    If possible, tell me what the set does? If it comes on for a moment and then the power light goes off--do the self check---press and hold both Menu AND Input buttons on the front of the TV for 5 seconds and release both--power light will blink a two digit code----for example 2 blinks, a pause and 2 blinks---it will repeat this 10 times.



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Ok, I know this song--this set has a receiver built into it(DM board) it is a large metal box on the left side as you look from the back--usually it just needs 4 1000 mfd 16 volt caps and one or two fuses on that board replaced---450 seems a bit high----that receiver while large has only a few screws holding it in and 4 or 5 plugs

It is a $$$$ decision----if you look thru all my solutions on this site you will see I have answered this question for many other people who have this type of set with the same problem.

Let me know if I can help you---

Regards, SD TECH

Posted on Sep 30, 2009


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The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
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Sorry... you likely have one of the power amp channels bad as well. One does NOT replace the power supply, instead repair it. You need a competent repair shop. I can tell you what parts are blown on the supply. They cost about $30 max for parts to repair the power supply. There usually is about $15 of parts blown on the amp that caused the problem and significant labor to repair the amp portion. If the smoke was dark or heavy, it was likely from the 0.03 ohm metering resistor on the bottom of the amp circuit board that caused the original problem. If one replaces the power supply and turns power on they will find one side of the amp doesn't work and MAY blow the power supply again immediately. I have repaired several of these units and have walked others through the repair sequence as well. You can contact me directly by email for more info if you need it. Unless you can find a competent repair shop that replaces components, including work on surface mounted boards, the cost of the module parts AND availability will preclude repair. The amp module is another $155 after the power supply is repaired if a channel is bad and one chooses to replace rather than repair.

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The power supply board probally dead,not worth repairing,beacuse the power supply board part and the labors of the Tech. the cost to u could be same amount of money to buy a new one.The new one cost only about $100 dollars.

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You got a issue with the power supply if the green light goes off and does not bring it back to standby.

One of th issues could be a bad capcitor, A fuse, a resistor its hard to tell without me doing a visual inspection on the unit. I would have a estimate done on it if it cost more then $150 upwards it would be in your best intrest to replace the tv at that point. But I would have the power supply checked.

If you like my advice please rate the solution.

Fixya Expert moderator.

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1 Answer

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You can get the repair kit which has the capacitors you need plus a cd with the repair instructions and full service manual at the following link for 35.00 with free shipping. Your model is the V19 but the V21 is the same kit you need as the V19, 20 and V21 are the same DMs Just click on the repair kit catagory and you will see the V21 DM repair kit. and if you leave them a message they will include the info for the WS55859 on the CD.Heres the link.

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