Determine Fuse Size?

[m4a2t0t]

Have a DV7 notebook with LED display and no backlight.



SMD labeled JS8 below the left side of the connector. How do I determine the max amperage? I know I can remove the fuse and jump the pads to get it working but if there is another surge it will destroy the mobo and/or panel.

The panel in the laptop is an LG LP173WD1 (TL) (E1)



LED Power Input Voltage 7v/12v/20v MIN/TYPICAL/MAX
LED Power Input Current NA/20mA/25mA
LED Power Comsumption NA/5.7W/6W
LED Power Inrush Current 1800mA

20V fuse and 2A to cover inrush current ?

Any help appreciated.

[reaper57]

Re: Determine Fuse Size?

Well, if you can't find a datasheet for it you can desolder the old one, solder two wires, connect them to a multimeter and check what kind of an amperage is going to the screen (you should set the brightness to max).
Btw are you sure that the fuse is the problem? Recently I fixed a dv6 on which the backlight wasn't working and it turned out that the cable wasn't properly inserted into the panel.

[budm]

Re: Determine Fuse Size?

Are you sure Js8 is for the fuse, I see JS6, JS7 close by.

[trebo]

Re: Determine Fuse Size?

have you jumpered the jumper???
those jumpers are common on boards, you should be able to find one on any scrap M/B