Can a new laptop graphics card cause the backlight on the screen to blow
I have a 2 year old sony vaio vgn fz11s, 4 weeks ago, blue and green lines appeared on the screen and the laptop turned itself off. I was able (with gooogle) to identify the graphics cards as the fault and managed to get the card replaced free of charge by Sony (it was a known fault on the card that Sony did not feel warranted a recall).
I recieved the laptop back after 3 days and all was well for 4 days. THEN. the backlight on the monitor failed and there was no output through the VGA or HDMI ports.
I sent the laptop back to Sony believing that the Graphics card was still the fault.
Today I recieved a quote for repair for £780 ouch..
Question: Can the new card be responsible for this new problem and does the lack of output from the VGA and HDMI ports still mean that the Graphics card is not working properly
Question:- Can a new graphics card cause a blown backlight.
I am extremely gratefull for any assistance you can give. (Sony require £150 just for Laptop assessment)