820-2915 LCD_PWR_EN missing

MDY

New member
LCD_PWR_EN is missing and no short to ground. Board chime and mouse light. No video, no backlight. Nothing with flashlight

Is that GPU problem? LVDS_DDC_CLK and LVDS_DDC_DATA present at 3.4V
 

MDY

New member
I replaced the GPU and now no mouse light and no chime.

I have noted Q7820 is damaged. But I am not sure how to check it as in boardview it is 4 pins. One pin left and 3 pins right and on board I see 6 pins chip. 3 pins up and 3 pins down.

I can measure 3.33V and 3.0V that goes to GPU.
 
Last edited:

dukefawks

Administrator
Why why why did you replace the GPU before confirming it was bad. Pull the GPU and see if the mouse light comes back, these boards should power on without a GPU installed. Q7820 must have been fine before all this mess as there was chime and mouse light......
 
Top