Screen has vertical, mostly red, lines on start up and later. Altogether picture is bad throughout.
The weird thing though is that the Windows crashes as well. The safe mode runs (with the error) but the full driven system crashes upon start up.
I tried to re-install the system but during the recovery process itself the screen error was present as well. That meant, I suppose, it wasn’t the Windows.
Because of crashing I suspect the motherboard or something big like that.

Test your laptop with an external monitor. Do you see same problem on the external image? If yes, probably this is graphics card related failure.

Is it possible that the screen returns some feedback and Windows crash upon a failure to receive.

Normally, a bad screen wouldn’t affect Windows functionality.

I’ve been having problems with Sony VGN-FE590P.
Screen has vertical, mostly red, lines on start up and later. Altogether picture is bad throughout.
The weird thing though is that the Windows crashes as well. The safe mode runs (with the error) but the full driven system crashes upon start up.
I tried to re-install the system but during the recovery process itself the screen error was present as well. That meant, I suppose, it wasn’t the Windows.
Because of crashing I suspect the motherboard or something big like that.
I wanted to open the laptop to check for a visible damage so that’s what I’m doing now.
Is it possible that the screen returns some feedback and Windows crash upon a failure to receive.
Do you have any advice how to test for the problem?

Thanks,
Angelo

What is the input voltage to the inverter?
I tested it and got two reading…11.01 and 10.38 volts..DC off pin 1 to ground.

Cannot tell the exact voltage. 10-11 volts sounds about right.

Does the laptop have a lid switch? I cant find one and there is no settings in the bios to adjust.

The laptop has to have some kind of lid close switch. If it doesn’t have a good old physical button somewhere close to the hinge, most likely the laptop has a magnetic lid switch – a piece of small magnet inside the display panel activates the switch which is hidden under the palmrest.

I have a Sony VAIO VGN-AX570G I had the LCD screen replaced 2 years ago but recently it started to flicker until finally the backlight stopped working. So I had the power inverter replaced YESTERDAY with an authentic Sony inverter. At first it was running perfect for several hours.

Then I restarted it and t flickered but stabilized. But now (today) the backlight won’t come on. What is wrong it?

It’s hard to tell what is causing the problem but it’s possible you have a bad backlight lamp inside the LCD screen.
The only way to find out what is bad is testing the laptop with another known good screen.

Two questions.
What is the input voltage to the inverter?
I tested it and got two reading…11.01 and 10.38 volts..DC off pin 1 to ground.

Does the laptop have a lid switch? I cant find one and there is no settings in the bios to adjust.

Then I restarted it and t flickered but stabilized. But now (today) the backlight won’t come on. What is wrong it? It is so frustrating because this is the 2nd time within 5 years that I replaced the LCD screen. I never dropped, banged it, nothing.
Please advise, thank you.

I have a Sony VAIO VGN-AX570G I had the LCD screen replaced 2 years ago but recently it started to flicker until finally the backlight stopped working. So I had the power inverter replaced YESTERDAY with an authentic Sony inverter. At first it was running perfect for several hours.

Then I restarted it and t flickered but stabilized. But now (today) the backlight won’t come on. What is wrong it? It is so frustrating because this is the 2nd time within 5 years that I replaced the LCD screen. I never dropped, banged it, nothing.

It’s hard to tell.
There is a chance the new inverter is defective. It’s not likely but possible. Did you buy it from an official Sony reseller? Can you exchange this inverter under warranty?
If it’s not the inverter, probably you have a faulty backlight lamp inside the LCD screen. In this case you’ll have to replace the screen.
I really cannot tell which one is causing the problem without testing the laptop with another known good inverter or backlight lamp.

I don’t know whee you buy spare parts, but some new replacement screens available here.

Then I restarted it and t flickered but stabilized. But now (today) the backlight won’t come on. What is wrong it? It is so frustrating because this is the 2nd time within 5 years that I replaced the LCD screen. I never dropped, banged it, nothing.
Please advise, thank you.

Two questions.
What is the input voltage to the inverter?
I tested it and got two reading…11.01 and 10.38 volts..DC off pin 1 to ground.

Does the laptop have a lid switch? I cant find one and there is no settings in the bios to adjust.