Hp CQ71-405SF Internal display very Dark

[passete]

I have here a CQ71 mobo with a weird symptom :
the internal lcd (LED) is very dark at point that I can't use it.
I have made a "soft" reflow on gpu and no change, with LED display, there are not external inverters like before ?
I read that he could be just a setting using the original keyboard, but I don't have any keyboard compatible with this mobo.
same lcd display work's fine on another CQ71 mobo.

Any hints ?
Thanks

[passete]

Re: Hp CQ71-405SF Internal display very Dark

Anyone Please ?

[looofy]

Re: Hp CQ71-405SF Internal display very Dark

do you mean by (very dark) there is a few light ? or there is no light

[looofy]

Re: Hp CQ71-405SF Internal display very Dark

check the voltage in cn1 VADJ1 ,BLON_CON and +VIN_BLIGHT

[wibble]

Re: Hp CQ71-405SF Internal display very Dark

Sometimes there is a fuse near the LCD connector which can go open.