Olevia 237-T12 horisontal lines after 1 min

[zape]

Please check this video, the symptoms after 1 min
Is this power supply?
https://photos.app.goo.gl/lUEJxNfBMr8m9Vgp2

[zape]

Re: Olevia 237-T12 horisontal lines after 1 min

any thoughts anyone?
I now lean towards bad T-CON

[Andrew F. Ali]

Re: Olevia 237-T12 horisontal lines after 1 min

Looks like Backlights to me.....However,.....Remove the back...Upload pics of the boards and their lay-out...Measure and post voltages on PSU.

[zape]

Re: Olevia 237-T12 horisontal lines after 1 min

Here are some photos.
All voltages are about 4% higher than the specs printed on the PSU.
5.2v
18.7v
25.0v

I replaced one bulged capacitor on the +24 output rail but it did not help.

[zape]

Re: Olevia 237-T12 horisontal lines after 1 min

The backlight is not flickering as I can see it from the holes on the back.
And I really doubt it may cause that "image jumping".

[zape]

Re: Olevia 237-T12 horisontal lines after 1 min

OK I did a little bit of diagnostics.
When I press on the BGA chip on the mainboard the screen distortion reduces.
So I guess it is the main board.
Is there any way to fix?

[ivtec]

Re: Olevia 237-T12 horisontal lines after 1 min

OK I did a little bit of diagnostics.
When I press on the BGA chip on the mainboard the screen distortion reduces.
So I guess it is the main board.
Is there any way to fix?

You could try to heat the BGA ; see video

https://www.youtube.com/watch?v=XOpi3FbeqpY

[zape]

Re: Olevia 237-T12 horisontal lines after 1 min

Baked the board for 8min on 375F and it works now!
here are some photos:

[zape]

Re: Olevia 237-T12 horisontal lines after 1 min

HDMI ports still get the lines and jumping, and it looks like Digital TV went out. I only get analog channels now.

[zape]

Re: Olevia 237-T12 horisontal lines after 1 min

after 3rd bake attempt I just bought the new main board for $10 off ebay

[ivtec]

Re: Olevia 237-T12 horisontal lines after 1 min

after 3rd bake attempt I just bought the new main board for $10 off ebay

Where did you buy the board?did the eBay main board worked? give link to the seller please, i have an Olevia 32 that i need a 32-S12 main board

[zape]

Re: Olevia 237-T12 horisontal lines after 1 min

The seller I bought from had only one.
Just search by part number