Question about Toshiba Projection Televisions

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Toshiba theatre view tv. No picture. Appears as if t.v. is off but power light keeps blinking. Will not turn on with either the remote or power button on t.v.

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If you unplug the tv from ac. Let it sit for 10 minutes. Plug it back in and check if its on.

or


ONE: Do a hard reset. Merely unplug the power cord for 4 hours or more. This will clear any software corruptions that might have accumulated.

TWO: When you turn the set on listen very carefully for a sizzle or crackling sound down in the lower back side of the set. This is the high voltage coming up. If you donot hear it the high voltage generator is faulty. If you do hear it and still a blank picture you have video processing troubles. Either way it is not a home remedy and you will need a service tech to diagnose the set with instrumentation.

Posted on May 18, 2008

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The problem could be in the convergence amps. stk's., common failure on Toshiba TVs.
The power board which has the power transformer has a set of wires that go to the convergence circuit. If you disconnect this cable the unit will power up. Of course the convergence is all messed up because its missing its voltages, 30 18 18 give or take.
Let me know if you need further assistance.

Posted on May 18, 2008

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Hi,

You will have to get it serviced and thats the only solution.It is a power supply issue.It is gone into protection mode to further avoid any damage.

Goodluck..

Posted on May 18, 2008

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Hello im2ntens,


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. Powering down the set or putting it in standby 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. Also, just leave the TV on. Don't turn in off. Since it is LCD, it doesn't take much power...only a few bucks extra a month for your utility bill.

4. 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.

5. 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 of a bust capacitor (not same model):
toshiba theatre view tv.  - d738639.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!

Don't forget to "Accept" this solution if you find that it helped you :)

Thank you for using FIXYA!

IrishDruid

Posted on May 18, 2008

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