Question about Mitsubishi VS-50705 50" Rear Projection Television

2 Answers

Mitsubishi VS-50705, 50 inch Rear projection TV won't turn on!

Hi, the tv was working fine & it has barely been used since '99. I haven't used it in forever. I plugged it into the wall outlet & it won't turn on. The green light in front just clicks on & off 1 second. The TV won't turn on though. The power button on the TV does the same. Is it because I don't have the TV Cable plugged in? I doubt that. What happened? I don't know what to do?!! Please help me. Is there a reset button or something?? I have the same problem as giggles99's did and would love to be able to read the answers you gave her on how to fix my Mitsibushi VS 50705 which turns the power button on for 1 second and then off. Can you help me with this please. I'm un-employed and I'd like to be able to fix it myself if possible. I did unplug it for a few minutes to see if it would reset and that didn't work.

bvr

Posted by on

  • antoonv May 16, 2008

    When I hold in the menu and Power button I'm getting a 22 error code, how serious is that?

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1. Try this - hold the menu button down for 10 seconds. TV should power up; you will have to turn off front panel buttons on menu.

2. You can also try plugging in the TV through the USB on its panel to a computer or USB charger, and it may work. However, this is only a temporary solution.

3. Not using the TV in a while may have allowed the power supply to cool. Weak capacitors often go out of spec when they cool, thus preventing a section of the power supply from firing up properly again. There is a simple trick...just warm the back of the TV with a hair dryer for 5-7 mins after you have unplugged the TV. Look for the little areas of holes in the back panel of TV. Use these as your guide at where to use the hairdryer, but don't hold the dryer too close (say 5-6inches away). (Make sure the dryer is on High heat). If the TV doesn't turn on after you have heated it up (like it tries to come on but then turns off) you need to unplug the TV again, this resets it. And repeat those steps till it works. Resetting the TV after it fails to turn on is the key.

4. Some TV's require an input signal (from cable/VCR/DVD/CD, etc) to enable them to power on. Try connecting a cable line or DVD to the TV and see if this helps.

5. A circuit board may crack about some of the larger components mounted on it. You can inspect the PCB's for fractures, and then repair them. It may also be poor soldering that has failed. I would be checking for these things first.

6. If you want to go in for a long term solution, you can easily replace the whole power board or just change the faulty capacitors. You will have to open the back panel and take a look. You can make out which are faulty, because their caps will be swollen on top. Here's a sample pic (not same model):
Mitsubishi VS-50705, 50 inch Rear projection TV wo - 97ff1dc.jpg
Check the specifications of the faulty capacitors, and get the replacements from your local electronics shop. If you are comfortable with this, you can use a pair of needle nose pliers to G-E-N-T-L-Y pull out the defunct capacitors. Once that is done, solder in the new capacitors carefully. If are unsure how to do this, try to get a friend who knows how to do this kinda stuff do it for you, or get a qualified technician. Warning: If you do not have a background in electronics repair, or are inexperienced, get a qualified technician to do it for you.

REMEMBER there are very dangerous voltages inside a TV that can KILL. Be sure to work SAFE when dealing with electricity. DISCONNECT THE POWER BEFORE YOU DO ANYTHING.

Hope that helps!

Posted on May 16, 2008

  • Swilin Sampson
    Swilin Sampson May 18, 2008

    Looks like a power board issue. You will most likely have to get the entire board replaced. If you are unsure, please call a qualified technician, as there are voltages in the TV set that can kill, even when powered off. Please be careful.

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Here are the answers for giggles99':

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Posted on May 16, 2008

  • Matt Jurach
    Matt Jurach May 16, 2008

    22 error code is a generic short circuit code. You should focus your attention on the fuses in the power supply board. The power supply board may need to be replaced.

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but try this:
The 3 flashes of the led when you plug the unit in is the
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This unit has an error code diagnostics.

On the front panel of the unit press and hold the INPUT and MENU
buttons at the same time and hold them down for about 5 or 6 seconds.
The unit should activate it's error code mode.

The led will flash count the number of flashes. It will then pause for
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The unit will repeate this for about 5 or 6 times.

You now have the two digit error code. The first time the led flashed
is the first number of the error code, the next time the led flashed is
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12 ----------- indicates no error
21 ------------- X-Ray Protect circuit
22 ------------ Short Protect circuit
23 ------------- Horizontal Deflection failure
24 ------------- Vertical Deflection failure


Most units give a error code "22" short protect circuit. If so check:

Q5A00
C557

If Q5A00 check bad there are other parts that have to be checked or
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