hello guys,
i have an acer vn7-791G machine here. the touchpad died (controller shorted out - synaptics). i ordered a new touchpad, which should work fine though. but the problem is, that this clickpad is working neither. i measured the voltages on the connector tp1 and found out that the ec_tpclk signal is missing (no 3.3 V here). i replaced the kbc but no luck... resistors are working fine. tp_in_r goes low when tp is connected an stays high if no touchpad is present. already tried different flex cable (but orignal one is working fine).
3D3V_TP_S3: 3.3 v
EC_TPDATA_R: 3.3 V
EC_TPCLOCK_R: 0 V
I2C lines are present with 3.3v
tp_lid_close_: 3.3 v (when machine is running)
measurements around the connector an i2c circuit for usb serial connection are not suspicious.
i also cleared me with the newest firmware band tried different bios files...
in windows the device manager isn't recognizing the touchpad at all...
everything else looks fine, functional and without any problems. any suggestions here? thanks guys!
tp circuit on page 62, kbc lines can be found on page 24
i have an acer vn7-791G machine here. the touchpad died (controller shorted out - synaptics). i ordered a new touchpad, which should work fine though. but the problem is, that this clickpad is working neither. i measured the voltages on the connector tp1 and found out that the ec_tpclk signal is missing (no 3.3 V here). i replaced the kbc but no luck... resistors are working fine. tp_in_r goes low when tp is connected an stays high if no touchpad is present. already tried different flex cable (but orignal one is working fine).
3D3V_TP_S3: 3.3 v
EC_TPDATA_R: 3.3 V
EC_TPCLOCK_R: 0 V
I2C lines are present with 3.3v
tp_lid_close_: 3.3 v (when machine is running)
measurements around the connector an i2c circuit for usb serial connection are not suspicious.
i also cleared me with the newest firmware band tried different bios files...
in windows the device manager isn't recognizing the touchpad at all...
everything else looks fine, functional and without any problems. any suggestions here? thanks guys!
tp circuit on page 62, kbc lines can be found on page 24
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