Question about Mitsubishi WS-55859 55" Rear Projection Television

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Mitsubishi ws-55859 parts

Hi ,, I need a circuit board for my Mitsubishi ws-55859 rear projection tv. it is the main board that has the tuner ,, mine has corrossion on it and the set would not start ,, the green light flashes

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Time to get a new one.
even you get the main board, you might have other problem that has not show up yet.

Posted on Oct 14, 2008


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This could mean the DM (HD tuner) failed. In the future connect your TV to a good surge protector. The manufacturer's solution is to replace the module and swap the memory from the failed part to the new one. (Except for the memory it is just an unplug one and plug in the new one.)

If you are handy with a soldering iron, you may be able to fix this by opening the DM module and removing 8 capacitors (as I understand the board) and replacing them. All 8 are 1000uf 16v 105C Capacitors

This URL has an good explanation of the process:

I hope this helps.

Cindy Wells

Jun 19, 2010 | Mitsubishi WS-55859 55" Rear Projection...

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I need the companys name that I can call about the DM board repair for a Mitsubishi Model # WS-55859

See PTSELECTRONICS.COM. Or see or Union, They have a refurbished boards. These are very good leads!

May 11, 2010 | Mitsubishi WS-55859 55" Rear Projection...

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I have a Mitsubishi WS- 55859 projection screen tv and the screen/lamp flashes on and off a couple of times then lamp go off but you can still hear static.The TV is on but not picture is getting to the...

The WS-55859 does not have a "Lamp" it is a 2001 rear projection set with three picture tubes.

Have (if this is the correct model) you tried the self check this set has?

Also do you have this problem on all inputs--tuner, and various rear inputs?

The more you tell me the better I can help you.

Got a IM?


Feb 23, 2010 | Mitsubishi WS-55859 55" Rear Projection...

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I have a mitsubishi ws 55859 that has a green blinking light. and the TV wont turn on. Don't know how to fix it

The convergence board or the verticle is bad. needs professional repairs can cost anywhere from $ 180 to 350. Check it out at

Feb 22, 2010 | Mitsubishi WS-55859 55" Rear Projection...

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Model ws-55859. When tv is turned on, it immediately turns off. Is it the timer set or some other problem?

is a power supply overload is normaly a HV Circuit defective, need to be repaired send to repair.

Feb 14, 2010 | Mitsubishi WS-55859 55" Rear Projection...

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Timer light flashes tv won`t turn on. mitsubishi model #55859

You have a bad DM board - the capacitors are bad and need to be replaced. I was able to replace them myself. There are no replacement parts available and many repairmen will charge hundreds of dollars and there is no guarantee they will fix it.

Jul 06, 2009 | Mitsubishi WS-55859 55" Rear Projection...

1 Answer

55859 withh flashing timer

Chances are very good that this type of problem is a cold solder joint on one of the circuit boards. Unless you know exactly what you are doing don't attempt to fix this type of problem. The circuit boards in rear projections TV can carry enough voltage to kill you even if the set is not plugged in. Contact a repair shop and get an estimate. Then do a repair vs. new flat panel replacement comparison.
Hope this will put the right perspective on your problem.

Dec 10, 2008 | Mitsubishi WS-55859 55" Rear Projection...

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Need part 955C230001 for WS-55859

Not good news for you;
Mitsubishi TV assembly 
Since this seems to be an entire board, I suspect that it may have failed and some devices on it may be proprietary making the repair impossible.  The 'chip foundries' are capable of designing a complex integrated circuit in weeks and then giving it a unique part number that belongs exclusively to the company that designed it, making the part impossible to buy from a normal supplier.
If anyone is interested and junking this set due to the high assembly replacement cost, I'd like to get one of these to see if the board is repairable. It may have inexpensive components that have failed and can be easily replaced.  I have the equipment and knowledge that would allow me to either repair it or at least judge its repairability. If you are interested, please email me at: (remove the 'AT' and replace it with the proper symbol.)

Oct 25, 2008 | Mitsubishi WS-55859 55" Rear Projection...

1 Answer


No,there is not. Capacitors are found in every powered circuit
in electronic products.
What board do you mean?
Please give details helpful to repairing your tv........T.

Oct 23, 2007 | Mitsubishi WS-55859 55" Rear Projection...

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