Flatron l246wp-bn White Screen

[Dragunbayne]

The screen turns on and is bright white. I have checked for bad caps, checked the fuse on the T-con board and checked the power going into the T-con board. From the spec sheet I found it says the four vdd pins for the T-con should be 5 volts, they are less than 4. Could this be the cause of my problem? All help is greatly appreciated.

[budm]

Re: Flatron l246wp-bn White Screen

Is your 5V power supply on the power supply board also showing 4VDC?

[Dragunbayne]

Re: Flatron l246wp-bn White Screen

The 5V off the power supply does read 5V, but oddly the 12V reads 14.4V.

Edit: I wanted to test the voltage on the T-Con again for good measure and realized the markings on the board don't actually correspond to the connector. So I tested with the proper pins and the voltage read 4.85, so I guess that's not the issue.

[momaka]

Re: Flatron l246wp-bn White Screen

Post pictures of the t-con board. In particular, there should be a round inductor inductor somewhere on the t-con. It's usually somewhat near the t-con connector. This is the main area of interest, so take more pictures of that area and post them here.

Also, see if any component on the t-con gets hot when you try to power on the monitor.

[Dragunbayne]

Re: Flatron l246wp-bn White Screen

Pictures of the T-Con.







EDIT: Added better full shot.

[kc8adu]

Re: Flatron l246wp-bn White Screen

is that an as15 chip i see?
its the one with leads on all 4 sides.
high failure rate part and can do just what you are seeing.

[Dragunbayne]

Re: Flatron l246wp-bn White Screen

The chip is not labelled. The board model is M240UW01 if that helps.

[budm]

Re: Flatron l246wp-bn White Screen

It is AUOPTO board/screen which uses AS15 IC for Gamma voltage ref. Please look at the P/N of that IC.

[Dragunbayne]

Re: Flatron l246wp-bn White Screen

Sorry, I don't see any labeling on the chip. Here is a close up:

[Dragunbayne]

Re: Flatron l246wp-bn White Screen

HA! I just zoomed in on the picture and I can see it is an AS15. It's very difficult to see the writing on the chip physically but it can be seen pretty clearly in the picture. Is this likely the issue then?