Question about Televison & Video

2 Answers

Daytek DT3220 power button flashes green 4 (5) times, no picture

I have a two year old DAYTEK DT3220 LCD TV. When powered on with remote or front button, it goes green for about 1/4 seconds, and then flashes 4 more times (staying dim gren aftewards).

When one turns it off, the backlight comes on for an instant and the picture in picture box is visible on the lower right of the screen.

I've checked the power supply (these models are famous for problems with it) but am showing a solid 5, 12 and 24 volts on the outputs.

Anyone able to advise me what to look at next ?

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 286 Answers

The power supply voltages might look good on an oscilliscope or using a DC meter, but that doesn't really tell you if the supply is good.

Your TV has an unusual symptom, however 99% of the problems on these TVs are caused by the power supply. I have had 3220s that won't power on, the remote or controls on the TV won't work, or the unit blanks out and all sorts of other odd problems. The power supply can test fine, but if you substitute it the TV will work fine.
Sorry to say you're up a creek. The good news is that just about any 5,12,24V power supply for a 32:" TV will work if you are comfortable rewiring the connectors. I have done this a few times and rescued the TVs from an early grave (I'm actually just about to start on another one now). The pinout is written on the board, and make sure the power supply you want to use also has the pinouts marked on the board.

Posted on Jul 22, 2009

  • 2 more comments 
  • Mergatroid Jan 21, 2010

    This is an update to this TV problem. Over the years we have had many of these TVs come in with different problems.
    1: Controls not working - needs a new main board - not available
    2: Any display defects - main board or LCD panel - not available
    3: LED blinking in pattern, no video, remote won't work, blanks out.

    The problems in #3 can be repaired by replacing the power board. You have to find a power board with 5V always on, 12V switched, and 24V switched.

    Switched means those voltages stay off until the TV is turned on. You should look for a power board that at least has the same width with mounting holes in the corners. You need at least two of the holes to line up with the mounts on the chassis. You can use hot melt glue and stand-offs to secure the other end of the board. If you do this, make sure you use some wire to ground the output side of the power board to the chassis.

    You will have to rewire the connectors that go from the power board to the main board. This can be hard to do, and soldering will be required. So you will need a power board that has the outputs marked on the board.

    One more thing: You need a power board that can use an inverted "enable" signal from the main board. With this TV, the main board enable signal (S) is on (5V) all the time. When you turn the TV on, this signal drops to ground to turn on the 12V and 24V. If you cannot find a power board that can use an inverted enable signal, you can wire in an inverter IC (74LS04). This will invert the enable signal from the main board, only requires 4 wires and is fairly easy to do. I use hot melt glue to secure the IC to the chassis. Make sure you either use enough glue to prevent the leads from touching the chassis or mount it on the plastic pad located under the power supply. Cut off all the IC leads you don't use.

    Please note. The original power board is a sneaky thing. The power lines can measure good with an oscilloscope but it can still cause the blanking out issue. Don't be fooled into thinking it's good.


  • Mergatroid Jan 21, 2010

    Man this is a strange site. For some reason it logged me out before my comment was saved.

    The update was written by Mergatroid Jan 21 2010.


  • Mergatroid Jul 23, 2010

    Just google 74LS04 data sheet. The datasheet will give you the pinout of the IC. It will contain four inverters.
    You need to connect the 5V live to the always on 5V from the supply, and the ground pin to ground.

    Now, run the enable signal from the main board to the input of one inverter, and the output of that inverter to the power board. Four wires: 5V, GND, Invert In, Invert out.


  • Mergatroid Jul 23, 2010

    Google 74LS04 Datasheet. This will give you the pinout.

    On the chip: +5V to the always on +5V on the power supply.
    GND to GND
    One inverter input to the main board S (enable) line. (there are four inverters).
    The same inverter output to the power board enable line.

    That's it. +5V, GND, Invert In, Invert Out.


×

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Night Owl:

    An expert who has answered 10 or more questions between 12 midnight and 6am on the same day.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 78 Answers

Does anybody have a drawing of this inverter circut using the 74LS04 to invert the enable circut?

Thanks

Posted on Jul 18, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Daytek TV reset code


If nothing else works, connect your TV to a receiver ir an XBOX One or even a ROKU 3 device. Each of these will power on your tv set automatically when you power on the device.

Mar 24, 2014 | Televison & Video

1 Answer

Daytek tv code


0195 0226 0720. Try these codes. If you wish to get more; check the site linked here. It has set-up code list & set-up procedure to many popular brand remote controls. See it in "Mosaic" view. It will make surf easier.
http://electrohelponline.blogspot.com/

Mar 24, 2014 | Televison & Video

1 Answer

Daytek lcd tv Error codes


Just count the number of flashes occur at one time switch on.

May 31, 2013 | Televison & Video

1 Answer

Daytek 46" LCD TV.. When


Hi,

Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Good luck in solving the problem....

Jun 09, 2011 | Televison & Video

1 Answer

Daytek television will not turn on.


There is a manual switch on the bottom of the TV. Flick it on and TV screen should come on. The power light will come with this switch off but the screen won't. It had me cursing for a while until I saw the little switch.

May 15, 2010 | Televison & Video

1 Answer

Daytek television will not turn on.


There is a switch on the bottom of the unit that has to be turned on. The power light will come on but not the screen until the switch is on.

Mar 27, 2010 | Televison & Video

1 Answer

On Daytek LCD DT4040, After some time like 2-3 hour, sometime 10-15 minutes, image from source disapear and red and green line appear... Not actually on DVI input, no trouble since 30 minutes.. on test for...


i have a daytek dt 4040 and when i turn it on,i push the red button ,flash 5 or 6 time and turn green have sound but no image. what the problem

Aug 19, 2008 | Televison & Video

1 Answer

Daytek dt 3220 will not power on


OK, your Daytek 3220 is not a projection TV, but an LCD TV.

Second, I hate to say it, but you bought a piece of junk. They have excellent pictures when they're new, but after a few years capacitors in the power supply go bad. When this happens, either the controls and remote stop working, or the TV starts blanking out, or it will just die and never work again.

The solution is to go buy a new TV. The power supplies are no longer available, and even if you could get one very often the faulty power supply has damaged the main board and/or the LCD panel.

In about 5% of these cases, replacing the capacitors will get the TV to work, in about 25% it will get the TV to work, but because the main board has been damaged the TV will intermittently blank out. In another 25% the LCD panel has been damaged so once repaired you will see dark streaky patches across the display.

In the rest of the units you could have all three problems or any combination of them.

It'ds really too bad because they use a Samsung panel, and have excellent pictures when they're working.

Jul 23, 2008 | Pioneer SD-643HD5 64" Rear Projection...

1 Answer

Got power no picture , DAYTEK DT3000 LCD


Its you video card, it may just need a new eeprom chip

May 06, 2008 | Televison & Video

2 Answers

TV remote code ????


DAYTEK PDP TV REMOTE CODE

Mar 24, 2008 | Televison & Video

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

1,199 people viewed this question

Ask a Question

Usually answered in minutes!

Top Televison & Video Experts

The Knight
The Knight

Level 3 Expert

71095 Answers

Electro Med Services...
Electro Med Services...

Level 3 Expert

6694 Answers

yadayada
yadayada

Level 3 Expert

66433 Answers

Are you a Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...