Viewsonic va2213w illumination problem

[ciki022]

Viewsonic VA2213W, there is an illumination problem, in the middle of the screen, images attached.
I visualy checked the power board and main board, there is no bulged capacitors, no burnings, everything looks normal, and quite good.
I dont have ESR meter, only digital multimeter, but I didnt measured any voltages.
I found service manual, also in attachment.

Where to start looking for the problem ?

[selldoor]

Re: Viewsonic va2213w illumination problem

Did you have the set before the fault
Have you tried it on another cable vga/ dvi
Have you tried another screen on the pc
Remove clean and replace the cable to the tcon (if it has one)
Post Good clear picture of the boards invluding tcon or panel board

May be a faulty panel

[ciki022]

Re: Viewsonic va2213w illumination problem

Did you have the set before the fault

I dont understand what You mean

Have you tried it on another cable vga/ dvi
Have you tried another screen on the pc

I tried both in first place

Remove clean and replace the cable to the tcon (if it has one)
Post Good clear picture of the boards invluding tcon or panel board

I will post images later

[selldoor]

Re: Viewsonic va2213w illumination problem

I meant
Did you own the set before the fault - have you seen it working correctly.
Did it just come on like that one day - just a history of how the fault developed.

[ciki022]

Re: Viewsonic va2213w illumination problem

No, I dont own it, it is my friends property, and I will ask him about the fault

[Davi.p]

Re: Viewsonic va2213w illumination problem

I've never seen this defect. with all hooked up and monitor opened detach the lvds ribbon conn. and see if the white light is uniform, 90% is not lamp problem, but sadly, if is not that i think is a panel defect very much difficult to repair (since i don't see very much knowledge about panel problems here, documents in the web are few).