[SOLVED] 820-2796 - No Backlight

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menatwork

New member
F8000:
8.38V


J9000:

Pin 01 - 0.16V
Pin 02 - 0
Pin 03 - 0
Pin 04 - 0
Pin 05 - 0
Pin 06 - 0.13V
Pin 07 - 0.11V
Pin 08 - 0.11V
Pin 09 - 0.11V
Pin 10 - 0.12V
Pin 11 - 0.12V
Pin 12 - 0
Pin 13 - 0
Pin 14 - 0
Pin 15 - 0
Pin 16 - 0
Pin 17 - 0
Pin 18 - 0
Pin 19 - 0
Pin 20 - 0
Pin 21 - 0
Pin 22 - 0
Pin 23 - 0
Pin 24 - 0
Pin 25 - 0
Pin 26 - 0
Pin 27 - 0
Pin 28 - 0
Pin 29 - 0
Pin 30 - 0.17V

Q9807

Pin 1 - GND
Pin 2 - BKLT_PLT_RST_L - 0V
Pin 3 - LCDBKLT_EN_L - - 8.03V
Pin 4 - LCDBKLT_DISABLE - 0.20V
Pin 5 - LCDBKLT_EN - 0V
Pin 6 - LCDBKLT_DISABLE - 0.22

Q9806:

Pin 1 - PPBUS_SW_LCDBKLT_PWR - 0V
Pin 2 - PPBUS_SW_LCDBKLT_PWR - 0V
Pin 3 - LCDBKLT_EN_DIV - 8.14V
Pin 4 - PPBUS_S0_LCDBKLT_FUSED - 8.38V
Pin 5 - PPBUS_SW_LCDBKLT_PWR - 0V
Pin 6 - PPBUS_SW_LCDBKLT_PWR - 0V

R9808:
300K

R9809
147K
 
Last edited:

menatwork

New member
U9000

Pin 1 - LCD_IG_PWR_EN - 0v
Pin 2 - PP3V3_S5 - 3.30V
Pin 3 - PP3V3_S5 - 3.30v
Pin 4 - PP3V3_SW_LCD_UF - 0V
Pin 5 - PP3V3_SW_LCD_UF - 0V
Pin 6 - GND
 

larossmann

Administrator
Staff member
if this is not chiming you have a much bigger problem. Are CPU & GPU vcore present? If the internal LCD is unplugged, can you get an image on external monitor?
 

menatwork

New member
no, it's not liquid damage. I just replaced the screen only. screen is good. but does not have video/back light. just sound and external video.
 
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