HP Compq CQ40 - CCFL on but no image

[Nocta]

Hi guys,

I got this Compaq CQ40. It all works, except for the laptop display. The laptop goes on, you hear the sound when Windows starts, the CCFL of the display is on but no image is shown.
I tried with an external monitor and it works. It's weird.

I tried reballing the GPU but the problem persists.

Any ideas?

I attach 2 images of the motherboard with the plastic (I know)

Thanks in advance.

[selldoor]

Re: HP Compq CQ40 - CCFL on but no image

check cable at motherboard and at panel.
Is there a board on the panel? any fuses on it?

[Nocta]

Re: HP Compq CQ40 - CCFL on but no image

I unplugged and plug again the cable from the MB to the panel but nothing.

The fuse in the MB, IIRC gives 2 or 20 ohms.

I think it's the cable, sometimes they fail after so many times you open and close the lid, but I'm not sure...

[punjac za laptop]

Re: HP Compq CQ40 - CCFL on but no image

did you find the solution , i`ve hhad several issues like that

[Nocta]

Re: HP Compq CQ40 - CCFL on but no image

Actually nop.

Tomorrow I'm going to a friends' to test the display and the ribbon cable. I'll post the news.

[Nocta]

Re: HP Compq CQ40 - CCFL on but no image

Ok, so one of the 30 cables of the cable that goes from the panel to the MB was literally cut. I soldered a bit of a new cable and now it's working.

[punjac za laptop]

Re: HP Compq CQ40 - CCFL on but no image

thanx for letting us know about the solution .