Hi, i have here HP 840 G6 (6050A3022501-MB-A01) with no backlight and i can't find the problem which causes it. Laptop is booting it gives image without backlight on LCD, it gives image also over HDMI.
What i did already:
- check all fuses on mb(ok)
- measured on LCD mb fuses, ok, one have 11,99v other one 3.3v
- swapped the LCD with working one (no effect same problem no backlight)
- searched for short (in connector area) on mb couldn't find anything
- checked connector pins on both sides - ok
- BIOS updated to newest version
LVDS_VDD_EN_TOUCH - 3.3v
BKLT_EN - 3.3v
LID_SW#_3 - 3.3v
If somebody can direct me to more test or solution ill appreciate that.
What i did already:
- check all fuses on mb(ok)
- measured on LCD mb fuses, ok, one have 11,99v other one 3.3v
- swapped the LCD with working one (no effect same problem no backlight)
- searched for short (in connector area) on mb couldn't find anything
- checked connector pins on both sides - ok
- BIOS updated to newest version
LVDS_VDD_EN_TOUCH - 3.3v
BKLT_EN - 3.3v
LID_SW#_3 - 3.3v
If somebody can direct me to more test or solution ill appreciate that.
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