View source for Poco X3 Pro No Touch (common fault)

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== Problem description ==
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The touch of the device is not working after a drop or damage by a technician while repairing it.  
== Symptoms ==
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Detail all measurable or observable symptoms in this section. 
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* Touch not working

== Solution ==
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Generally in this condition there is the touch protocol line called TOUCH_SPI that gets damaged. 

* Check diode value in the marked pins,
** You should get 0.500-0.700 diode value in these lines. 
* Missing resistor:
** In the condition you got any missing resistor here and if its value is marked with 20Ω then you can run a jumper through
** if the missing resistor has value 1K Ω (shown in the pic) then you will have to replace it with 1K resistor. 

[[File:SPI.png|center|thumb|544x544px|SPI]]

* Here is the origin of these touch lines that come directly from the cpu(color coded to match the image on top):

[[File:Spi from cpu poco x3 pro.png|center|thumb|Spi from cpu]]