Hello ,
i bought an laptop Compaq Presario CQ70 .
When i bought the laptop, there a problem with the LVDS the flex burnt because a shorted . And this shorted has burnt a mosfet after DC_IN connector. I change the mosfet and the laptop work without backlight.
I tried to change LCD panel, Inverter, LVDS cable and the same problem no backlight.
I tested if i have 3VS but no 3VS on LVDS and when i check the motherboard i seen the D21 and D22 are missing. On pad ( printed trace) of D21 and D22 on the motherboard i found 3VS but not on C364 and not on C374.
I tried to jump on motherboard the lines of D21 and D22 each separately without any result.
I put 3VS directly to the inverter brighteness_con and ec_blon and the backlight work.
i bought an laptop Compaq Presario CQ70 .
When i bought the laptop, there a problem with the LVDS the flex burnt because a shorted . And this shorted has burnt a mosfet after DC_IN connector. I change the mosfet and the laptop work without backlight.
I tried to change LCD panel, Inverter, LVDS cable and the same problem no backlight.
I tested if i have 3VS but no 3VS on LVDS and when i check the motherboard i seen the D21 and D22 are missing. On pad ( printed trace) of D21 and D22 on the motherboard i found 3VS but not on C364 and not on C374.
I tried to jump on motherboard the lines of D21 and D22 each separately without any result.
I put 3VS directly to the inverter brighteness_con and ec_blon and the backlight work.
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