Having problems with your HP Pavilion DV9720US Notebook ?

Hp laptop 9720us screen wont brighten or dim. last week my screen went blank brought it to a shop they changed the inverter and also some cable connection . works fine just not quite as bright as before . It is about 1 yr old I've changed power settings and nothing happens .i've tried changing default monitors and nothing changes. I've made sure I've updated the bios. I have also tried the fn+f7 and f8 key and nothing happens. I try to run in with and without the power cord and nothing . before


Answers :

You got the wrong inverter fitted - i'm sure your unit requires a sinle lamp inverter and they have cheated - putting in a generic lamp inverter and branching togeather the wires to accomodate the single plug thus reducing the available volatage for the lamps - this is why it's dim - correct part is 431391-001 Display panel power inverter - For use with single lamp display panel
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