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Hi: Im having an issue with a A820-3332 motherboard with PPBUS_G3H at 2.8V instead of 12.6V No chime, no fan spin one wire-circuit working with green light on MagSafe. On scouting, I find this may be perhaps because of PPV removing U8900 (62882), the PPVCORE_GPU shows 18 ohms to ground! Please...

Hi: Im reflowing the famed U8900 in an A1398 2012 MBP Retina 15 for display issues and notice that the continuity on PIN 39 and 40 in system off state (power and battery disconnected) is short to ground. Can someone please confirm if the PIN 39 with signal GFXIMVP_DPSLP_EN and PIN 40 with...

Hi: I will appreciate any help in diagnosing missing PP3V3_SW_LCD_UF from U9000 due to which the system is unable to detect embedded LCD panel. On checking I find that LCD_IG_PWR_EN (input to U9000) is also low. System boots and external display port is working. Please Guide...

Hi: I have a peculiar issue with the 820-2838 board display working but no backlight due to missing LCD_BKLT_EN & BKLT_PLT_RST_L. On investigating I find that PCIE_RESET_L is also low. Apparently the missing signals is what's causing Q9806 not to turn on although the booster circuit seems to be...