820-00850 internal screen not working

Djsp

Member
Hi, I have this machine where the internal video doesn't work, but I get the external video, I've already found myself in similar situations, and the damage seems to be a CPU data line.
I get EDP_PANEL_PWR_BUF_EN, EDP_PANEL_PWR_BUF_EN,
PP3V3_S0SW_LCD_R, DP_INT_HPD with their nominal value, the measurement was made with the screen connected, the thing that stopped me is the measurement in positive diode to ground mode of EDP_INT_AUX_N = 0.0016
no damage evident liquid j8500 in good condition
 
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