Hello. As in description, TP and KB are not working when connected to the OEM display (working one). The angle sensor was damaged by a water, other than that I cannot find any more liquid damage or even stains. I took the bezel off the LCD to inspect but it looks intact. when I connect a spare LCD it works like a charm. I never seen before a laptop where KB and TP would work due to a display that is displaying without any issue. Any idea?
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Review the smbus / I2C and all SPI interface lines. These interfaces will also be used by the trackpad and could be causing your issues. -
I did some measurements, and the only thing I found off is the I2C DISP BKLT SDA and I2C DISP BKLT SCL lines. They show 1.24V and some data flow during boot, then goes OV. I compared this with another working LCD, where the voltage remains steady — that's the only difference I found.
There's one SPI line I don't have access to; I'd need to solder a wire to the connector to measure it. So yes, the faulty screen sometimes displays content and sometimes doesn't. In both cases, the touchscreen and keyboard aren't working.Attached FilesComment
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Suddenly TB and KB started working. No idea why..Comment
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