Question about Mitsubishi WS-73909 73" Rear Projection Television

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DM Board 955C230001

We have a Mitsubishi WS-73909. Whenever our power goes out--even when the set is off--the blinking green light appears. We had this fixed a couple of years ago. Earlier in the summer the same thing happened. The local authorized Mitsubishi repair place replaced the controller/board, but still didn't work. This took many many weeks as the DM board was on back order.

After the board replacement didn't work, they then took the "guns" or lights back to their shop. When I called a few weeks ago, they indicated they still couldn't get anything to work and had concluded that the replacment DM board was bad. They indicated they would order another DM board.

When I called them today, they now indicate that Mitsubishi no longer makes that part. Ugh. They are looking for a board on the secondary market.

I also called Mitsubishi to see about a replacement part and to express my disappointment with this entire process, but I think that fell on deaf ears.

Any thoughts?

thankyou.

Posted by on

  • michael_sier Feb 20, 2009

    have a Mitsubishi WS-73909 S/N 101968. Initially $5.5K my cost with $1800 in repair for the guns last year. The picture was perfect


    I had an authorized repair person from Barrett’s in Carol Stream, Illinois tell me I need a DM module for my TV. In particular the E2 Board that is inside the DM module.



    He indicated the E2 module is the master memory / setup for the television. The EEPROM’s on the E2 board scrambled.



    The repair technician stated these parts are no longer available and Mitsubishi no longer will repair these units.



    If I can locate this part I can have the repair tech come back and install it. I know this is a long shot but I thought I would ask.



    I have a 6 foot tall by 5 foot wide DEAD television in my family room. It will kill me to junk it.



    Very Best Regards,

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6 Suggested Answers

  • 1694 Answers

SOURCE: Mitsubishi flashing light replaced capasitors that were blown tv still has flashing light

The four cap replacement in DM module repair is simplistic
and incomplete, as you found out. ALL defective DM modules
have bad SMC's ( small "top hat" caps) AKA surface-mount
capacitors that can be changed only by the most highly skilled
bench techs. We used to change out hundreds years ago in
camcorder circuit board repair.DM board repair is a much more
accessible,thus more "do-able". For more info.............T.

Posted on Nov 05, 2007

SOURCE: Blinking green light stays on and TV won't turn on.

Green Blinking Light - Order a DM Modual from Mitsubishi. Read the plug labels when reinstalling.

Posted on Dec 14, 2007

Slinteriors
  • 8617 Answers

SOURCE: Mitsubishi WS 48511 Blinking Green Power Light

Your model will have two picos mounted on the same board with the 7 capacitors they will look like resistors without the color bands they will be F9B01 and F9B00 check them for continuity.

Posted on Jul 28, 2008

  • 1 Answer

SOURCE: mitsubishi WS-55909 dm board repair

I have a mitsubishi 48" integrated 1080. The Timer green light keeps blinking. I have no picture. Can this be the fuse? My coworkers say this might be the problem. Can I replace it myself? If so, where is it located?

meeh.shell@yahoo.com

Posted on Oct 16, 2008

freetek
  • 5568 Answers

SOURCE: 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:
freetekATlycos.com (remove the 'AT' and replace it with the proper symbol.)

Posted on Oct 28, 2008

ladywinn
  • 5138 Answers

SOURCE: mitsubishi ws-65511 Green light blinking found bad

Front Keypads go bad alot on these sets,replace the Keypad.

Posted on Dec 24, 2009

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1 Answer

Ws 73909 has bad dm module. Where can I get it repaired or replaced?


If this is for the green blinking light issue, you can easily fix yourself if you have a soldering iron. It is just a few capacitors. But if you can't, then just about any mom n pop service compony will fix it for you, but will charge a lot of money to do it.

Mar 19, 2013 | Mitsubishi WS-73909 73" Rear Projection...

1 Answer

I have a Mitsubishi rear projection TV (WS-73909) that didn't turn on and had a green blinking light. I replaced the 7 DM capacitors and now it turns on. Both the remote and front control panel ca


Let me know as I can look for this---the set has a keyboard lockout that is cleared by holding the menu or another front button for more than 5-10 seconds with set on---I can find the service manual and check if needed.

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1 Answer

Green timer light blinks on my mitsubishi ws-73909


ONLY 1 of 2 things can cause this problem----

First thing to do is remove front speaker grill--it should pull out and issecured with plastic pegs--behind it you will find an inspection plate---

Notice the one or two pairs of wires coming from the front keyboard of theset---remove the inspection plate and follow the wires to the right--you canunplug both plugs(most have two and they are marked with letters and differents so you cannot get them wrong)

The idea here is to remove the front keyboard with its reset button etc fromthe circuit---You will still be able to try to turn the set on with theremote---

These sets have a Receiver that is called a DM board--(large metal box to theleft as you look from the back) and if the power goes out the green light will blink for about 70 seconds and then goout---it is the Receiver booting up. It is called the DM board.

If disconnecting the keyboard allows the set to turn on--you have a bad resetswitch and two choices---either operate the set only with the remote or toremove the front screen and get at the reset switch (it is tiny) and removeand/or replace it.

If disconnecting the keyboard does not restore the set to operation---thereceiver is bad---there are 4 or more caps and some pico fuses that can fail inthat unit---Mitsubishi no longer sells or repairs these--if it is bad and not the caps there is acompany you can send the unit to and have it repaired--if you need to knowtheir name let me know---

You can call them and get a quote for repairing the receiver.


Let me know what more information you need--I am here to help.


SD TECH

Nov 26, 2010 | Mitsubishi WS-73909 73" Rear Projection...

2 Answers

Mitsubishi tv model ws-65315, when i turn the set on, the green light comes on for a second then the set turns off what could it be


If the DM Board it bad you can fix it yourself.

There is a guide with pictures to help you.

It is easily fixable for about $10 worth of capacitors

Or a whole kit with all tools needed for $36

http://servicemanuals.vstore.ca/product_info.php/pName/v21v19-mitsubishi-dm-repair-kit/cName/repair-kits

That is an extremely common problem with Mitsubishi tvs old and new. It can be fixed easily and cheaply for those willing to use their hands.

Refer to this guide to replace the capacitors on your DM Power Circuit Board part # 935C9860. You could also have someone else do it for you for $100

Guide for a $10 DIY repair in capacitors : http://hdtvoice.com/voice/showthread.php?t=32186

Paid Rebuild Service: http://shop.ebay.com/?_from=R40&_trksid=m570&_nkw=PWB-PM-ASSY+REBUILD+SERVICE

That fixes the problem most of the time.

After replacing capacitors is you still get green light try replacing the EEprom. EEprom board also known as the E2P board is part number 935C978001

See. http://www.justanswer.com/tv-repair/37xf7-find-dm-power-board-935c9860-ws-65869-mitsubishi.html

And: http://www.moduslinkptstvboards.com/Search.aspx?k=935C978001

Useful links:
http://www.hdtvoice.com/voice/archive/index.php/t-20219.html

http://www.hometheatershack.com/forums/mitsubishi/23626-mitsubishi-ws55511-green-blinking-light.html

http://hdtvoice.com/voice/printthread.php?t=18816&pp=20

http://www.techlore.com/forum/thread/18565/Mitsubishi-WS-65711-HDTV-Green-Blinking-Light/

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3 Answers

Mitsubishi WS-55909 dm board repair


The DM is fine if the led isnt blinking. Your set is going into protective shutdown. Try pressing the menu and the device/input buttons on the set both in together for 5 seconds to see if the set will blink a series of blinks pause then blink another series of blinks. Such as 2 blinks pause then 2 blinks, Then let me know what the blinks were and I will assist you with whats wrong

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MITSUBISHI WS-73909 will not turn on 1. I have a Mitsubishi Big screen TV model no WS-73909. Few days a go the city power went out when the TV was off. The TV had a surge protector. Then the TV will not go...


Are you a Quailified Technician ? Because this repair is not for the novice. The best thing I can tell you is contact a Mitsubishi Authorized repair center or tell me what area you live in and I can find one for you. cost is 250-350 to repair.

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had same problem with my tv.Technician told me to remoe front cover and unplug the 2 plugins going to the buttons then try the mistubishi remote to turn tv on.Did this and worked fine with remote.

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Mitsubishi WS-55909 dm board repair


I have a mitsubishi 48" integrated 1080. The Timer green light keeps blinking. I have no picture. Can this be the fuse? My coworkers say this might be the problem. Can I replace it myself? If so, where is it located?

meeh.shell@yahoo.com

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Blinking green light stays on and TV won't turn on.


Check for open pico fuse in power supply caused by bad convergence I.C.Get pro help-you have a good set to save.Remember--practice visual acuity technique!And,above all else,do no harm!!

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